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OWC MaxRAM Memory Certification

Get up to double the amount of RAM than factory supports
Fully tested and Certified to work properly.
Why Buy OWC Brand Memory?
  • Meets or exceeds manufacturer specifications.
  • Rigorously in-house lab tested to ensure superior quality, compatibility and reliability.
  • Backed by industry leading lifetime advanced replacement. If you need your OWC memory replaced, we will ship to you same day.
OWC MAXRAM logo The OWC 'MaxRAM' Certification Program determines the maximum amount of memory that can be installed in a Mac as validated by a series of comprehensive, in-house laboratory tests. While OWC "MaxRAM" configurations exceed Apple's officially supported maximums, all OWC brand memory upgrades are assured to perform flawlessly and are covered by a Lifetime Advance Replacement Warranty and Money Back Guarantee.
Below is a list of Macs that have been OWC MaxRAM Certified to be capable of utilizing up to double the memory than Apple specifies. You can also view all of OWC Memory options for all computers.
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iMac Intel
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
iMac 27-inch Retina 5K Early 2019 (3.7, 3.6, 3.1GHz)
iMac19,1  -  4 slots
Upgradable 64.0 GB 128.0 GB
iMac 27-inch Retina 5K Early 2019 (3.0GHz)
iMac19,1  -  4 slots
Upgradable 32.0 GB 128.0 GB
iMac 21.5-inch Retina 4K Early 2019
iMac19,2  -  2 slots
Upgradable 32.0 GB 64.0 GB
iMac 27-inch Retina 5K Mid 2017 (4.2, 3.8, 3.5GHz)
iMac18,3  -  4 slots
Upgradable 64.0 GB 64.0 GB
iMac 27-inch Retina 5K Mid 2017 (3.4GHz)
iMac18,3  -  4 slots
Upgradable 32.0 GB 64.0 GB
iMac 21.5-inch Retina 4K Mid 2017 (3.6, 3.4GHz)
iMac18,2  -  2 slots
Upgradable 32.0 GB 64.0 GB
iMac 21.5-inch Retina 4K Mid 2017 (3.0GHz)
iMac18,2  -  2 slots
Upgradable 16.0 GB 64.0 GB
iMac 21.5-inch Mid 2017
iMac18,1  -  2 slots
Upgradable 16.0 GB 64.0 GB
iMac 27-inch Retina 5K Late 2015
iMac17,1  -  4 slots
Upgradable 32.0 GB 64.0 GB
iMac 21.5-inch Retina 4K Late 2015
iMac16,2
Upgradable 16.0 GB 16.0 GB
iMac 21.5-inch Late 2015
iMac16,1
Upgradable 16.0 GB 16.0 GB
iMac 27-inch Retina 5K Mid 2015
iMac15,1  -  4 slots
Upgradable 32.0 GB 32.0 GB
iMac 27-inch Retina 5K Late 2014
iMac15,1  -  4 slots
Upgradable 32.0 GB 32.0 GB
iMac 21.5-inch Mid 2014
iMac14,4
Upgradable 8.0 GB 8.0 GB
iMac 27-inch Late 2013
iMac14,2  -  4 slots
Upgradable 32.0 GB 32.0 GB
iMac 21.5-inch Late 2013
iMac14,3  -  2 slots
Upgradable 16.0 GB 16.0 GB
iMac 21.5-inch Early 2013
iMac13,3  -  2 slots
Upgradable 16.0 GB 16.0 GB
iMac 27-inch Late 2012
iMac13,2  -  4 slots
Upgradable 32.0 GB 32.0 GB
iMac 21.5-inch Late 2012
iMac13,1  -  2 slots
Upgradable 16.0 GB 16.0 GB
iMac 21.5-inch Late 2011
iMac12,1  -  4 slots
Upgradable 16.0 GB 32.0 GB
iMac 27-inch Mid 2011
iMac12,2  -  4 slots
Upgradable 16.0 GB 32.0 GB
iMac 21.5-inch Mid 2011
iMac12,1  -  4 slots
Upgradable 16.0 GB 32.0 GB
iMac 27-inch Quad-Core Mid 2010
iMac11,3  -  4 slots
Upgradable 16.0 GB 32.0 GB
iMac 27-inch Dual-Core Mid 2010
iMac11,3  -  4 slots
Upgradable 16.0 GB 16.0 GB
iMac 21.5-inch Mid 2010
iMac11,2  -  4 slots
Upgradable 16.0 GB 16.0 GB
iMac 27-inch Quad-Core Late 2009
iMac11,1  -  4 slots
Upgradable 16.0 GB 32.0 GB
iMac 27-inch Core 2 Duo Late 2009
iMac10,1  -  4 slots
Upgradable 16.0 GB 16.0 GB
iMac 21.5-inch Late 2009
iMac10,1  -  4 slots
Upgradable 16.0 GB 16.0 GB
iMac 20-inch Mid 2009
iMac9,1  -  2 slots
Upgradable 8.0 GB 8.0 GB
iMac 24-inch Early 2009
iMac9,1  -  2 slots
Upgradable 8.0 GB 8.0 GB
iMac 20-inch Early 2009
iMac9,1  -  2 slots
Upgradable 8.0 GB 8.0 GB
iMac 24-inch Early 2008
iMac8,1  -  2 slots
Upgradable 4.0 GB 6.0 GB
iMac 20-inch Early 2008
iMac8,1  -  2 slots
Upgradable 4.0 GB 6.0 GB
iMac 24-inch Mid 2007
iMac7,1  -  2 slots
Upgradable 4.0 GB 6.0 GB
iMac 20-inch Mid 2007
iMac7,1  -  2 slots
Upgradable 4.0 GB 6.0 GB
iMac 24-inch Late 2006
iMac6,1  -  2 slots
Upgradable 3.0 GB 4.0 GB
iMac 20-inch Late 2006
iMac5,1  -  2 slots
Upgradable 3.0 GB 4.0 GB
iMac 17-inch Late 2006
iMac5,2  -  2 slots
Upgradable 2.0 GB 2.0 GB
iMac 17-inch Mid 2006
iMac4,2  -  2 slots
Upgradable 2.0 GB 2.0 GB
iMac 20-inch Early 2006
iMac4,1  -  2 slots
Upgradable 2.0 GB 2.0 GB
iMac 17-inch Early 2006
iMac4,1  -  2 slots
Upgradable 2.0 GB 2.0 GB
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Mac mini
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
Mac mini Late 2018
Macmini8,1  -  2 slots
Upgradable 64.0 GB 64.0 GB
Mac mini Late 2014
Macmini7,1
Upgradable 16.0 GB 16.0 GB
Mac mini Late 2012
Macmini6,2  -  2 slots
Upgradable 16.0 GB 16.0 GB
Mac mini Mid 2011
Macmini5,2  -  2 slots
Upgradable 8.0 GB 16.0 GB
Mac mini Mid 2010
Macmini4,1  -  2 slots
Upgradable 8.0 GB 16.0 GB
Mac mini Late 2009
Macmini3,1  -  2 slots
Upgradable 4.0 GB 8.0 GB
Mac mini Early 2009
Macmini3,1  -  2 slots
Upgradable 4.0 GB 8.0 GB
Mac mini Mid 2007
Macmini2,1  -  2 slots
Upgradable 2.0 GB 4.0 GB
Mac mini Late 2006
Macmini1,1  -  2 slots
Upgradable 2.0 GB 2.0 GB
Mac mini Early 2006
Macmini1,1  -  2 slots
Upgradable 2.0 GB 2.0 GB
Mac mini Late 2005
PowerMac10,2  -  1 slots
Upgradable 1.0 GB 1.0 GB
Mac mini Early 2005
PowerMac10,1  -  1 slots
Upgradable 1.0 GB 1.0 GB
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Mac Pro
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
Mac Pro 12-Core Late 2013
MacPro6,1  -  4 slots
Upgradable 64.0 GB 128.0 GB
Mac Pro 10-Core Late 2013
MacPro6,1  -  4 slots
Upgradable 64.0 GB 128.0 GB
Mac Pro 8-Core Late 2013
MacPro6,1  -  4 slots
Upgradable 64.0 GB 128.0 GB
Mac Pro 6-Core Late 2013
MacPro6,1  -  4 slots
Upgradable 64.0 GB 128.0 GB
Mac Pro Quad-Core Late 2013
MacPro6,1  -  4 slots
Upgradable 64.0 GB 128.0 GB
Mac Pro 12-Core Mid 2010-2012
MacPro5,1  -  8 slots
Upgradable 64.0 GB 128.0 GB
Mac Pro 6-Core Mid 2010-2012
MacPro5,1  -  4 slots
Upgradable 32.0 GB 48.0 GB
Mac Pro Quad-Core Mid 2010-2012
MacPro5,1  -  4 slots
Upgradable 32.0 GB 48.0 GB
Mac Pro 12-Core Mid 2010-2012
MacPro5,1  -  8 slots
Upgradable 64.0 GB 128.0 GB
Mac Pro 8-Core Mid 2010-2012
MacPro5,1  -  8 slots
Upgradable 64.0 GB 128.0 GB
Mac Pro 6-Core Mid 2010-2012
MacPro5,1  -  4 slots
Upgradable 32.0 GB 48.0 GB
Mac Pro Quad-Core Mid 2010-2012
MacPro5,1  -  4 slots
Upgradable 32.0 GB 48.0 GB
Mac Pro 8-Core Early 2009
MacPro4,1  -  8 slots
Upgradable 32.0 GB 128.0 GB
Mac Pro Quad-Core Early 2009
MacPro4,1  -  4 slots
Upgradable 16.0 GB 48.0 GB
Mac Pro 8-Core Early 2008
MacPro3,1  -  8 slots
Upgradable 32.0 GB 64.0 GB
Mac Pro Quad-Core Early 2008
MacPro3,1  -  8 slots
Upgradable 32.0 GB 64.0 GB
Mac Pro 8-Core Early 2007
MacPro2,1  -  8 slots
Upgradable 16.0 GB 32.0 GB
Mac Pro Quad-Core Mid 2006
MacPro1,1  -  8 slots
Upgradable 16.0 GB 32.0 GB
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MacBook Pro
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
MacBook Pro Touch Bar 15.4-inch Mid 2018
MacBookPro15,1
Upgradable 32.0 GB 32.0 GB
MacBook Pro Touch Bar 13.3-inch Mid 2018
MacBookPro15,2
Upgradable 16.0 GB 16.0 GB
MacBook Pro Touch Bar 15.4-inch Mid 2017
MacBookPro14,3
Upgradable 16.0 GB 16.0 GB
MacBook Pro Touch Bar 13.3-inch Mid 2017
MacBookPro14,1
Upgradable 8.0 GB 8.0 GB
MacBook Pro Touch Bar 15.4-inch Late 2016
MacBookPro13,3
Upgradable 16.0 GB 16.0 GB
MacBook Pro Touch Bar 13.3-inch Late 2016
MacBookPro13,2
Upgradable 16.0 GB 16.0 GB
MacBook Pro Retina 13.3-inch Late 2016
MacBookPro13,1
Upgradable 16.0 GB 16.0 GB
MacBook Pro Retina 15.4-inch Mid 2015
MacBookPro11,5
Upgradable 16.0 GB 16.0 GB
MacBook Pro Retina 13.3-inch Early 2015
MacBookPro12,1
Upgradable 16.0 GB 16.0 GB
MacBook Pro Retina 15.4-inch Mid 2014
MacBookPro11,3
Upgradable 16.0 GB 16.0 GB
MacBook Pro Retina 13.3-inch Mid 2014
MacBookPro11,1
Upgradable 16.0 GB 16.0 GB
MacBook Pro Retina 15.4-inch Late 2013
MacBookPro11,3
Upgradable 16.0 GB 16.0 GB
MacBook Pro Retina 13.3-inch Late 2013
MacBookPro11,1
Upgradable 16.0 GB 16.0 GB
MacBook Pro Retina 15.4-inch Early 2013
MacBookPro10,1
Upgradable 16.0 GB 16.0 GB
MacBook Pro Retina 13.3-inch Early 2013
MacBookPro10,2
Upgradable 8.0 GB 8.0 GB
MacBook Pro Retina 13.3-inch Late 2012
MacBookPro10,2
Upgradable 8.0 GB 8.0 GB
MacBook Pro Retina 15.4-inch Mid 2012
MacBookPro10,1
Upgradable 8.0 GB 8.0 GB
MacBook Pro Unibody 15.4-inch Mid 2012
MacBookPro9,1  -  2 slots
Upgradable 8.0 GB 16.0 GB
MacBook Pro Unibody 13.3-inch Mid 2012
MacBookPro9,2  -  2 slots
Upgradable 8.0 GB 16.0 GB
MacBook Pro Unibody 17-inch Late 2011
MacBookPro8,3  -  2 slots
Upgradable 8.0 GB 16.0 GB
MacBook Pro Unibody 15.4-inch Late 2011
MacBookPro8,2  -  2 slots
Upgradable 8.0 GB 16.0 GB
MacBook Pro Unibody 13.3-inch Late 2011
MacBookPro8,1  -  2 slots
Upgradable 8.0 GB 16.0 GB
MacBook Pro Unibody 17-inch Early 2011
MacBookPro8,3  -  2 slots
Upgradable 8.0 GB 16.0 GB
MacBook Pro Unibody 15.4-inch Early 2011
MacBookPro8,2  -  2 slots
Upgradable 8.0 GB 16.0 GB
MacBook Pro Unibody 13.3-inch Early 2011
MacBookPro8,1  -  2 slots
Upgradable 8.0 GB 16.0 GB
MacBook Pro Unibody 17-inch Mid 2010
MacBookPro6,1  -  2 slots
Upgradable 8.0 GB 8.0 GB
MacBook Pro Unibody 15.4-inch Mid 2010
MacBookPro6,2  -  2 slots
Upgradable 8.0 GB 8.0 GB
MacBook Pro Unibody 13.3-inch Mid 2010
MacBookPro7,1  -  2 slots
Upgradable 8.0 GB 16.0 GB
MacBook Pro Unibody 17-inch Mid 2009
MacBookPro5,2  -  2 slots
Upgradable 8.0 GB 8.0 GB
MacBook Pro Unibody 15.4-inch Mid 2009
MacBookPro5,4  -  2 slots
Upgradable 8.0 GB 8.0 GB
MacBook Pro Unibody 13.3-inch Mid 2009
MacBookPro5,5  -  2 slots
Upgradable 8.0 GB 8.0 GB
MacBook Pro Unibody 17-inch Early 2009
MacBookPro5,2  -  2 slots
Upgradable 8.0 GB 8.0 GB
MacBook Pro Unibody 15.4-inch Early 2009
MacBookPro5,1  -  2 slots
Upgradable 8.0 GB 8.0 GB
MacBook Pro Unibody 15.4-inch Late 2008
MacBookPro5,1  -  2 slots
Upgradable 4.0 GB 8.0 GB
MacBook Pro 17-inch Early 2008
MacBookPro4,1  -  2 slots
Upgradable 4.0 GB 6.0 GB
MacBook Pro 15.4-inch Early 2008
MacBookPro4,1  -  2 slots
Upgradable 4.0 GB 6.0 GB
MacBook Pro 17-inch Late 2007
MacBookPro3,1  -  2 slots
Upgradable 4.0 GB 6.0 GB
MacBook Pro 15.4-inch Late 2007
MacBookPro3,1  -  2 slots
Upgradable 4.0 GB 6.0 GB
MacBook Pro 17-inch Mid 2007
MacBookPro3,1  -  2 slots
Upgradable 4.0 GB 6.0 GB
MacBook Pro 15.4-inch Mid 2007
MacBookPro3,1  -  2 slots
Upgradable 4.0 GB 6.0 GB
MacBook Pro 17-inch Late 2006
MacBookPro2,1  -  2 slots
Upgradable 3.0 GB 4.0 GB
MacBook Pro 15.4-inch Late 2006
MacBookPro2,2  -  2 slots
Upgradable 3.0 GB 4.0 GB
MacBook Pro 17-inch Early 2006
MacBookPro1,2  -  2 slots
Upgradable 2.0 GB 2.0 GB
MacBook Pro 15.4-inch Early 2006
MacBookPro1,1  -  2 slots
Upgradable 2.0 GB 2.0 GB
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iMac Pro
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
iMac Pro 27-inch Late 2017
iMacPro1,1  -  4 slots
Upgradable 256.0 GB 256.0 GB
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MacBook
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
MacBook 12-inch Mid 2017
MacBook10,1
Upgradable 8.0 GB 8.0 GB
MacBook 12-inch Early 2016
MacBook9,1
Upgradable 8.0 GB 8.0 GB
MacBook 12-inch Early 2015
MacBook8,1
Upgradable 8.0 GB 8.0 GB
MacBook Unibody 13.3-inch Mid 2010
MacBook7,1  -  2 slots
Upgradable 4.0 GB 16.0 GB
MacBook Unibody 13.3-inch Late 2009
MacBook6,1  -  2 slots
Upgradable 4.0 GB 8.0 GB
MacBook Unibody 13.3-inch Mid 2009
MacBook5,2  -  2 slots
Upgradable 4.0 GB 6.0 GB
MacBook Unibody 13.3-inch Early 2009
MacBook5,2  -  2 slots
Upgradable 4.0 GB 6.0 GB
MacBook Aluminum 13.3-inch Late 2008
MacBook5,1  -  2 slots
Upgradable 4.0 GB 6.0 GB
MacBook 13.3-inch Early 2008
MacBook4,1  -  2 slots
Upgradable 4.0 GB 6.0 GB
MacBook 13.3-inch Late 2007
MacBook3,1  -  2 slots
Upgradable 4.0 GB 6.0 GB
MacBook 13.3-inch Mid 2007
MacBook2,1  -  2 slots
Upgradable 2.0 GB 3.0 GB
MacBook 13.3-inch Late 2006
MacBook2,1  -  2 slots
Upgradable 2.0 GB 3.0 GB
MacBook 13.3-inch Mid 2006
MacBook1,1  -  2 slots
Upgradable 2.0 GB 2.0 GB
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MacBook Air
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
MacBook Air 13.3-inch Late 2018
MacBookAir8,1
Upgradable 16.0 GB 16.0 GB
MacBook Air 13.3-inch Early 2015
MacBookAir7,2
Upgradable 8.0 GB 8.0 GB
MacBook Air 11.6-inch Early 2015
MacBookAir7,1
Upgradable 8.0 GB 8.0 GB
MacBook Air 13.3-inch Early 2014
MacBookAir6,2
Upgradable 8.0 GB 8.0 GB
MacBook Air 11.6-inch Early 2014
MacBookAir6,1
Upgradable 8.0 GB 8.0 GB
MacBook Air 13.3-inch Mid 2013
MacBookAir6,2
Upgradable 8.0 GB 8.0 GB
MacBook Air 11.6-inch Mid 2013
MacBookAir6,1
Upgradable 8.0 GB 8.0 GB
MacBook Air 13.3-inch Mid 2012
MacBookAir5,2
Upgradable 8.0 GB 8.0 GB
MacBook Air Education 13.3-inch Mid 2012
MacBookAir5,2
Upgradable 4.0 GB 4.0 GB
MacBook Air 11.6-inch Mid 2012
MacBookAir5,1
Upgradable 8.0 GB 8.0 GB
MacBook Air 13.3-inch Mid 2011
MacBookAir4,2
Upgradable 4.0 GB 4.0 GB
MacBook Air 11.6-inch Mid 2011
MacBookAir4,1
Upgradable 4.0 GB 4.0 GB
MacBook Air 13.3-inch Late 2010
MacBookAir3,2
Upgradable 4.0 GB 4.0 GB
MacBook Air 11.6-inch Late 2010
MacBookAir3,1
Upgradable 2.0 GB 2.0 GB
MacBook Air 13.3-inch Mid 2009
MacBookAir2,1
Upgradable 2.0 GB 2.0 GB
MacBook Air 13.3-inch Late 2008
MacBookAir2,1
Upgradable 2.0 GB 2.0 GB
MacBook Air 13.3-inch Early 2008
MacBookAir1,1
Upgradable 2.0 GB 2.0 GB
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Xserve
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
Xserve Early 2009 8-Core
Xserve3,1  -  8 slots
Upgradable 48.0 GB 96.0 GB
Xserve Early 2009 Quad-Core
Xserve3,1  -  6 slots
Upgradable 48.0 GB 48.0 GB
Xserve Early 2008
Xserve2,1  -  8 slots
Upgradable 32.0 GB 32.0 GB
Xserve Late 2006
Xserve1,1  -  8 slots
Upgradable 32.0 GB 32.0 GB
Xserve Early 2005
RackMac3,1  -  8 slots
Upgradable 8.0 GB 8.0 GB
Xserve Early 2004
RackMac3,1  -  8 slots
Upgradable 8.0 GB 8.0 GB
Xserve Early 2003
RackMac1,2  -  4 slots
Upgradable 2.0 GB 2.0 GB
Xserve Mid 2002
RackMac1,1  -  4 slots
Upgradable 2.0 GB 2.0 GB
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Power Mac G5
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
Power Mac G5 Dual-Core Late 2005
PowerMac11,2  -  8 slots
Upgradable 16.0 GB 16.0 GB
Power Mac G5 Quad-Core Late 2005
PowerMac11,2  -  8 slots
Upgradable 16.0 GB 16.0 GB
Power Mac G5 Dual-Core Early 2005
PowerMac7,3  -  8 slots
Upgradable 8.0 GB 8.0 GB
Power Mac G5 Late 2004
PowerMac9,1  -  4 slots
Upgradable 4.0 GB 4.0 GB
Power Mac G5 Dual-Core Mid 2004
PowerMac7,3  -  8 slots
Upgradable 8.0 GB 8.0 GB
Power Mac G5 Dual-Core Late 2003
PowerMac7,2  -  8 slots
Upgradable 8.0 GB 8.0 GB
Power Mac G5 Dual-Core Mid 2003
PowerMac7,2  -  8 slots
Upgradable 8.0 GB 8.0 GB
Power Mac G5 Mid 2003
PowerMac7,2  -  8 slots
Upgradable 8.0 GB 8.0 GB
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iMac G5
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
iMac G5 20-inch Late 2005
PowerMac12,1  -  1 slots
Upgradable 2.5 GB 2.0 GB
iMac G5 17-inch Late 2005
PowerMac12,1  -  1 slots
Upgradable 2.5 GB 2.0 GB
iMac G5 20-inch Mid 2005
PowerMac8,2  -  2 slots
Upgradable 2.0 GB 2.0 GB
iMac G5 17-inch Mid 2005
PowerMac8,2  -  2 slots
Upgradable 2.0 GB 2.0 GB
iMac G5 20-inch Mid 2004
PowerMac8,1  -  2 slots
Upgradable 2.0 GB 2.0 GB
iMac G5 17-inch Mid 2004
PowerMac8,1  -  2 slots
Upgradable 2.0 GB 2.0 GB
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eMac
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
eMac 17-inch Mid 2005
PowerMac6,4  -  2 slots
Upgradable 1.0 GB 2.0 GB
eMac 17-inch Early 2004
PowerMac6,4  -  2 slots
Upgradable 1.0 GB 2.0 GB
eMac 17-inch Mid 2003
PowerMac4,4  -  2 slots
Upgradable 1.0 GB 1.0 GB
eMac 17-inch Early 2002
PowerMac4,4  -  2 slots
Upgradable 1.0 GB 1.0 GB
Back to Top
PowerBook G4
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
PowerBook G4 Aluminum 17-inch Late 2005
PowerBook5,9  -  2 slots
Upgradable 2.0 GB 2.0 GB
PowerBook G4 Aluminum 15-inch Late 2005
PowerBook5,8  -  2 slots
Upgradable 2.0 GB 2.0 GB
PowerBook G4 Aluminum 17-inch Early 2005
PowerBook5,7  -  2 slots
Upgradable 2.0 GB 2.0 GB
PowerBook G4 Aluminum 15-inch Early 2005
PowerBook5,6  -  2 slots
Upgradable 2.0 GB 2.0 GB
PowerBook G4 Aluminum 12-inch Early 2005
PowerBook6,8  -  1 slots
Upgradable 1.25 GB 1.25 GB
PowerBook G4 Aluminum 17-inch Early 2004
PowerBook5,5  -  2 slots
Upgradable 2.0 GB 2.0 GB
PowerBook G4 Aluminum 15-inch Early 2004
PowerBook5,4  -  2 slots
Upgradable 2.0 GB 2.0 GB
PowerBook G4 Aluminum 12-inch Early 2004
PowerBook6,4  -  1 slots
Upgradable 1.25 GB 1.25 GB
PowerBook G4 Aluminum 17-inch Late 2003
PowerBook5,3  -  2 slots
Upgradable 2.0 GB 2.0 GB
PowerBook G4 Aluminum 15-inch Late 2003
PowerBook5,2  -  2 slots
Upgradable 2.0 GB 2.0 GB
PowerBook G4 Aluminum 12-inch Late 2003
PowerBook6,2  -  1 slots
Upgradable 1.25 GB 1.25 GB
PowerBook G4 Aluminum 17-inch Early 2003
PowerBook5,1  -  2 slots
Upgradable 1.0 GB 2.0 GB
PowerBook G4 Aluminum 12-inch Early 2003
PowerBook6,1  -  1 slots
Upgradable 640 MB 1.15 GB
PowerBook G4 Titanium 15.2-inch Late 2002
PowerBook3,5  -  2 slots
Upgradable 1.0 GB 1.0 GB
PowerBook G4 Titanium 15.2-inch Early 2002
PowerBook3,4  -  2 slots
Upgradable 1.0 GB 1.0 GB
PowerBook G4 Titanium 15.2-inch Late 2001
PowerBook3,3  -  2 slots
Upgradable 1.0 GB 1.0 GB
PowerBook G4 Titanium 15.2-inch Early 2001
PowerBook3,2  -  2 slots
Upgradable 1.0 GB 1.0 GB
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iBook G4
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
iBook G4 14-inch Mid 2005
PowerBook6,7  -  1 slots
Upgradable 1.5 GB 1.5 GB
iBook G4 12.1-inch Mid 2005
PowerBook6,7  -  1 slots
Upgradable 1.5 GB 1.5 GB
iBook G4 14-inch Late 2004
PowerBook6,5  -  1 slots
Upgradable 1.25 GB 1.25 GB
iBook G4 12.1-inch Late 2004
PowerBook6,5  -  1 slots
Upgradable 1.25 GB 1.25 GB
iBook G4 14-inch Early 2004
PowerBook6,5  -  1 slots
Upgradable 1.25 GB 1.25 GB
iBook G4 12.1-inch Early 2004
PowerBook6,5  -  1 slots
Upgradable 1.25 GB 1.25 GB
iBook G4 14-inch Late 2003
PowerBook6,3  -  1 slots
Upgradable 640 MB 1.25 GB
iBook G4 12.1-inch Late 2003
PowerBook6,3  -  1 slots
Upgradable 640 MB 1.25 GB
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Power Mac G4
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
Power Mac G4 MDD Mid 2003
PowerMac3,6  -  4 slots
Upgradable 2.0 GB 2.0 GB
Power Mac G4 FW800 Early 2003
PowerMac3,6  -  4 slots
Upgradable 2.0 GB 2.0 GB
Power Mac G4 MDD Mid 2002
PowerMac3,6  -  4 slots
Upgradable 2.0 GB 2.0 GB
Power Mac G4 QuickSilver Early 2002
PowerMac3,5  -  3 slots
Upgradable 1.5 GB 1.5 GB
Power Mac G4 QuickSilver Mid 2001
PowerMac3,5  -  3 slots
Upgradable 1.5 GB 1.5 GB
Power Mac G4 Digital Audio Early 2001
PowerMac3,4  -  3 slots
Upgradable 1.5 GB 1.5 GB
Power Mac G4 Gigabit Ethernet Mid 2000
PowerMac3,3  -  4 slots
Upgradable 2.0 GB 2.0 GB
Power Mac G4 Sawtooth Late 1999
PowerMac3,1  -  4 slots
Upgradable 2.0 GB 2.0 GB
Power Mac G4 Yikes Late 1999
PowerMac1,2  -  4 slots
Upgradable 1.0 GB 1.0 GB
Power Mac G4 Sawtooth Mid 1999
PowerMac3,1  -  4 slots
Upgradable 2.0 GB 2.0 GB
Power Mac G4 Yikes Mid 1999
PowerMac1,2  -  4 slots
Upgradable 1.0 GB 1.0 GB
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iMac G4
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
iMac G4 20-inch Late 2003
PowerMac6,3  -  1 slots
Upgradable 1.0 GB 2.0 GB
iMac G4 17-inch Late 2003
PowerMac6,1  -  1 slots
Upgradable 1.0 GB 2.0 GB
iMac G4 15-inch Late 2003
PowerMac6,1  -  1 slots
Upgradable 1.0 GB 2.0 GB
iMac G4 17-inch Early 2003
PowerMac6,1  -  1 slots
Upgradable 1.0 GB 2.0 GB
iMac G4 15-inch Early 2003
PowerMac4,2  -  1 slots
Upgradable 1.0 GB 1.0 GB
iMac G4 17-inch Mid 2002
PowerMac4,5  -  1 slots
Upgradable 1.0 GB 1.0 GB
iMac G4 15-inch Early 2002
PowerMac4,2  -  1 slots
Upgradable 1.0 GB 1.0 GB
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Power Mac G4 Cube
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
Power Mac G4 Cube Mid 2000
PowerMac5,1  -  3 slots
Upgradable 1.5 GB 1.5 GB
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iBook G3
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
iBook G3 14-inch Early 2003
PowerBook4,3  -  1 slots
Upgradable 640 MB 640 MB
iBook G3 12.1-inch Early 2003
PowerBook4,3  -  1 slots
Upgradable 640 MB 640 MB
iBook G3 14-inch Late 2002
PowerBook4,3  -  1 slots
Upgradable 640 MB 640 MB
iBook G3 12.1-inch Late 2002
PowerBook4,3  -  1 slots
Upgradable 640 MB 640 MB
iBook G3 14-inch Mid 2002
PowerBook4,3  -  1 slots
Upgradable 640 MB 640 MB
iBook G3 12.1-inch Mid 2002
PowerBook4,3  -  1 slots
Upgradable 640 MB 640 MB
iBook G3 14-inch Early 2002
PowerBook4,2  -  1 slots
Upgradable 640 MB 640 MB
iBook G3 12.1-inch Late 2001
PowerBook4,1  -  1 slots
Upgradable 640 MB 640 MB
iBook G3 12.1-inch Mid 2001
PowerBook4,1  -  1 slots
Upgradable 640 MB 640 MB
iBook G3 12.1-inch Late 2000
PowerBook2,2  -  1 slots
Upgradable 320 MB 576 MB
iBook G3 12.1-inch Early 2000
PowerBook2,1  -  1 slots
Upgradable 320 MB 544 MB
iBook G3 12.1-inch Mid 1999
PowerBook2,1  -  1 slots
Upgradable 320 MB 544 MB
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iMac G3
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
iMac G3 13.8-inch Mid 2001
PowerMac4,1  -  2 slots
Upgradable 1.0 GB 1.0 GB
iMac G3 13.8-inch Early 2001
PowerMac4,1  -  2 slots
Upgradable 1.0 GB 1.0 GB
iMac G3 13.8-inch Mid 2000
PowerMac2,2  -  2 slots
Upgradable 1.0 GB 1.0 GB
iMac G3 13.8-inch Late 1999
PowerMac2,1  -  2 slots
Upgradable 512 MB 1.0 GB
iMac G3 13.8-inch Early 1999
iMac,1  -  2 slots
Upgradable 128 MB 512 MB
iMac G3 13.8-inch Mid 1998
iMac,1  -  2 slots
Upgradable 128 MB 512 MB
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PowerBook G3
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
PowerBook G3 Pismo Early 2000
PowerBook3,1  -  2 slots
Upgradable 512 MB 1.0 GB
PowerBook G3 Lombard Mid 1999
PowerBook1,1  -  2 slots
Upgradable 384 MB 512 MB
PowerBook G3 PDQ Late 1998
406  -  2 slots
Upgradable 192 MB 512 MB
PowerBook G3 Wallstreet Mid 1998
314  -  2 slots
Upgradable 384 MB 512 MB
PowerBook G3 Kanga Late 1997
313  -  1 slots
Upgradable 160 MB 160 MB
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Power Mac G3
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
Power Mac G3 Blue & White Mid 1999
PowerMac1,1  -  4 slots
Upgradable 1.0 GB 1.0 GB
Power Mac G3 Blue & White Early 1999
PowerMac1,1  -  4 slots
Upgradable 1.0 GB 1.0 GB
Power Mac G3 Minitower Mid 1998
510  -  3 slots
Upgradable 384 MB 768 MB
Power Mac G3 All in One Early 1998
510  -  3 slots
Upgradable 384 MB 768 MB
Power Mac G3 Desktop Early 1998
510  -  3 slots
Upgradable 192 MB 768 MB
Power Mac G3 Minitower Early 1998
510  -  3 slots
Upgradable 384 MB 768 MB
Power Mac G3 Desktop Late 1997
510  -  3 slots
Upgradable 192 MB 768 MB
Power Mac G3 Minitower Late 1997
510  -  3 slots
Upgradable 384 MB 768 MB
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PowerBook
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
PowerBook 2400c Mid 1997
307  -  1 slots
Upgradable 112 MB 112 MB
PowerBook 1400c Mid 1997
311  -  1 slots
Upgradable 64 MB 64 MB
PowerBook 3400c Early 1997
306  -  1 slots
Upgradable 114 MB 114 MB
PowerBook 5300 Mid 1995
128  -  1 slots
Upgradable 64 MB 64 MB
PowerBook 190 Mid 1995
122  -  1 slots
Upgradable 36 MB 36 MB
PowerBook 520 Mid 1994
72  -  1 slots
Upgradable 36 MB 36 MB
PowerBook 540 Mid 1994
72  -  1 slots
Upgradable 36 MB 36 MB
PowerBook 150 Mid 1994
115  -  1 slots
Upgradable 40 MB 40 MB
PowerBook 165 Mid 1993
84  -  1 slots
Upgradable 14 MB 14 MB
PowerBook 180 Late 1992
33  -  1 slots
Upgradable 14 MB 14 MB
PowerBook 160 Late 1992
34  -  1 slots
Upgradable 14 MB 14 MB
PowerBook 145 Late 1992
54  -  1 slots
Upgradable 8 MB 8 MB
PowerBook 140 Late 1992
25  -  1 slots
Upgradable 8 MB 8 MB
PowerBook 170 Late 1991
21  -  1 slots
Upgradable 8 MB 8 MB
PowerBook 100 Late 1991
24  -  1 slots
Upgradable 8 MB 8 MB
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Power Macintosh
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
20th Anniversary Mac Early 1997
512
128 MB 128 MB
Power Macintosh 9600 Early 1997
67  -  12 slots
Upgradable 1.5 GB 1.5 GB
Power Macintosh 8600 Early 1997
69  -  8 slots
Upgradable 1.0 GB 1.0 GB
Power Macintosh 7300 Early 1997
109  -  8 slots
Upgradable 1.0 GB 1.0 GB
Power Macintosh 7220 Early 1997
515  -  3 slots
Upgradable 160 MB 160 MB
Power Macintosh 6500 Early 1997
513  -  2 slots
Upgradable 128 MB 128 MB
Power Macintosh 5500 Early 1997
512
128 MB 128 MB
Power Macintosh 5400 Early 1997
74
136 MB 136 MB
Power Macintosh 4400 Early 1997
515  -  3 slots
Upgradable 160 MB 160 MB
Power Macintosh 6400 Late 1996
58  -  2 slots
Upgradable 136 MB 136 MB
Power Macintosh 8515 Early 1996
69  -  8 slots
Upgradable 1.0 GB 1.0 GB
Power Macintosh 7600 Early 1996
68  -  8 slots
Upgradable 1.0 GB 1.0 GB
Power Macintosh 9515 Late 1995
67  -  12 slots
Upgradable 1.5 GB 1.5 GB
Power Macintosh 9500 Mid 1995
67  -  12 slots
Upgradable 1.5 GB 1.5 GB
Power Macintosh 8500 Mid 1995
69  -  8 slots
Upgradable 1.0 GB 1.0 GB
Power Macintosh 7500 Mid 1995
68  -  8 slots
Upgradable 1.0 GB 1.0 GB
Power Macintosh 7200 Mid 1995
108  -  4 slots
Upgradable 512 MB 512 MB
Power Macintosh 6200 Mid 1995
42  -  2 slots
Upgradable 64 MB 64 MB
Power Macintosh 5200 Early 1995
41  -  2 slots
Upgradable 64 MB 64 MB
Power Macintosh 8100 Early 1994
65  -  8 slots
Upgradable 264 MB 264 MB
Power Macintosh 7100 Early 1994
112  -  4 slots
Upgradable 136 MB 136 MB
Power Macintosh 6100 Early 1994
75  -  2 slots
Upgradable 136 MB 136 MB
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WorkGroup Sever
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
WorkGroup Sever 9650 Early 1997
67  -  12 slots
Upgradable 1.5 GB 1.5 GB
WorkGroup Sever 9150 Early 1997
39  -  8 slots
Upgradable 264 MB 264 MB
WorkGroup Sever 7350 Early 1997
109  -  8 slots
Upgradable 1.0 GB 1.0 GB
WorkGroup Sever 8550 Early 1996
69  -  8 slots
Upgradable 1.0 GB 1.0 GB
WorkGroup Sever 8150 Early 1994
65  -  8 slots
Upgradable 1.0 GB 1.0 GB
WorkGroup Sever 6150 Early 1994
75  -  2 slots
Upgradable 136 MB 136 MB
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Performa
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
Apple Performa 6360 Late 1996
58  -  2 slots
Upgradable 136 MB 136 MB
Apple Performa 6400 Mid 1996
58  -  2 slots
Upgradable 136 MB 136 MB
Apple Performa 6300CD Early 1996
42  -  2 slots
Upgradable 64 MB 64 MB
Apple Performa 5400CD Early 1996
74  -  2 slots
Upgradable 136 MB 136 MB
Apple Performa 5300CD Late 1995
41  -  2 slots
Upgradable 64 MB 64 MB
Apple Performa 6200CD Mid 1995
42  -  2 slots
Upgradable 64 MB 64 MB
Apple Performa 5200CD Mid 1995
41  -  2 slots
Upgradable 64 MB 64 MB
Apple Performa 6110CD Late 1994
75  -  2 slots
Upgradable 136 MB 136 MB
Apple Performa 630 Mid 1994
98  -  1 slots
Upgradable 36 MB 36 MB
Apple Performa 577 Early 1994
92  -  1 slots
Upgradable 36 MB 36 MB
Apple Performa 575 Early 1994
92  -  1 slots
Upgradable 36 MB 36 MB
Apple Performa 550 Late 1993
80  -  1 slots
Upgradable 36 MB 36 MB
Apple Performa 476 Late 1993
89  -  1 slots
Upgradable 132 MB 132 MB
Apple Performa 475 Late 1993
89  -  1 slots
Upgradable 132 MB 132 MB
Apple Performa 520 Mid 1993
56  -  1 slots
Upgradable 36 MB 36 MB
Apple Performa 600 Late 1992
45  -  4 slots
Upgradable 68 MB 68 MB
Apple Performa 400 Late 1992
37  -  2 slots
Upgradable 10 MB 10 MB
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Network Server
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
Network Server 700 Early 1996
N/A  -  8 slots
Upgradable 1.0 GB 1.0 GB
Network Server 500 Early 1996
N/A  -  8 slots
Upgradable 1.0 GB 1.0 GB
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PowerBook Duo
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
PowerBook Duo 2300c Mid 1995
118  -  1 slots
Upgradable 56 MB 56 MB
PowerBook Duo 280 Mid 1994
102  -  1 slots
Upgradable 40 MB 40 MB
PowerBook Duo 270c Late 1993
77  -  1 slots
Upgradable 28 MB 28 MB
PowerBook Duo 250 Late 1993
38  -  1 slots
Upgradable 28 MB 28 MB
PowerBook Duo 230 Late 1992
32  -  1 slots
Upgradable 28 MB 28 MB
PowerBook Duo 210 Late 1992
29  -  1 slots
Upgradable 28 MB 28 MB
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Quadra
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
Quadra 630 Mid 1994
98  -  1 slots
Upgradable 36 MB 36 MB
Quadra 650 Late 1993
36  -  4 slots
Upgradable 136 MB 136 MB
Quadra 610 Late 1993
53  -  2 slots
Upgradable 68 MB 68 MB
Quadra 605 Late 1993
94  -  1 slots
Upgradable 132 MB 132 MB
Quadra 800 Early 1993
35  -  4 slots
Upgradable 136 MB 136 MB
Quadra 950 Mid 1992
26  -  16 slots
Upgradable 256 MB 256 MB
Quadra 900 Late 1991
78  -  16 slots
Upgradable 256 MB 256 MB
Quadra 700 Late 1991
22  -  4 slots
Upgradable 68 MB 68 MB
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Other Macs
Mac Model Upgradable RAM? Factory
Supported
OWC MaxRAM
Apple LC 550 Early 1994
80  -  1 slots
Upgradable 36 MB 36 MB
Apple MacTV Late 1993
88  -  1 slots
Upgradable 8 MB 8 MB
Apple LC III Plus Late 1993
62  -  1 slots
Upgradable 36 MB 36 MB
Apple LC 475 Late 1993
89  -  1 slots
Upgradable 72 MB 72 MB
Apple LC 520 Mid 1993
56  -  1 slots
Upgradable 36 MB 36 MB
Apple LC III Early 1993
27  -  1 slots
Upgradable 36 MB 36 MB
Apple Centris 650 Early 1993
30  -  2 slots
Upgradable 136 MB 136 MB
Apple Centris 610 Early 1993
52  -  2 slots
Upgradable 68 MB 68 MB
Apple Mac Iivx Late 1992
48  -  4 slots
Upgradable 68 MB 68 MB
Apple LC II Early 1992
37  -  2 slots
Upgradable 10 MB 10 MB
Apple Classic Late 1990
17
4 MB 4 MB
Apple LC Late 1990
19  -  2 slots
Upgradable 10 MB 10 MB
Apple Mac Iisi Late 1990
18  -  8 slots
Upgradable 128 MB 128 MB
Apple Mac Iifx Early 1990
13
128 MB 128 MB
Apple Mac Iici Late 1989
11  -  8 slots
Upgradable 128 MB 128 MB
Apple Mac Iicx Early 1989
8  -  4 slots
Upgradable 65 MB 65 MB
Apple Mac Iix Late 1988
7  -  8 slots
Upgradable 128 MB 128 MB
Apple Mac II Early 1987
6  -  8 slots
Upgradable 128 MB 128 MB


  1. Current Mac OS X versions are unable to utilize more then 96GB RAM due to an operating system limitation. 128GB can be fully utilized by a 2009-2010 Mac Pro if running Boot Camp with 64-bit versions of Windows XP and later as well as with 64-bit versions of Linux.
  2. Although limited to physically utilizing a maximum of 3GB, there is a performance benefit due to 128 Bit addressing when 4GB (2GB x 2 Matched set) is installed.
MaxRAM is a trademark of New Concepts Development Corporation, registered in the U.S. Patent and Trademark Office. Apple, eMac, iBook, iMac, iPhone, iPod, iTunes, Mac, Mac Pro, MacBook, MacBook Pro, Macintosh, Power Mac, PowerBook, OS X, and SuperDrive are trademarks of Apple Inc., registered in the U.S. and other countries. Other marks may be the trademark or registered trademark property of their owners.