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Other World Computing - MacSales.com
Product Specs:
Professional Installation Highly Recommended
While this upgrade kit itself should not void your warranty, the installation process is very complex and thus it is recommended to be performed by a trained professional.
Memory Trade in
Save money by trading in your original chips! View available memory rebates.
From the purchase date of qualifying memory from OWC, you have 60 days to trade-in your old memory for a cash rebate!
Just fill out OWC's online rebate form or contact OWC Customer Service after you receive and install your new memory.
This memory kit and included memory is for Apple iMac 4K 2017 (21.5") Models only. Memory provided in this kit is special config for 21.5" ONLY and is NOT compatible with Apple iMac 27" Models. Included memory also compatible with PC Laptops which use DDR4 2133 or 2400 modules.

Includes

  • (2) 8GB 2400MHZ DDR4 SO-DIMM PC4-19200
  • (1) OWC Screen Removal Tool
  • (2) OWC 2-1/4" Suction Cup
  • (1) Torx T5S driver
  • (1) Torx T8S driver
  • (1) Torx T10S driver
  • (1) Phillips 00 driver
  • (1) Nylon Probe Tool
  • (1) 21.5" iMac Adhesive tape set for proper display resealing
  • (1) OWC Blue Microfiber Screen Cleaning Cloth
Please note: This memory kit and included memory is for Apple iMac 4K 2017 (21.5") Models only. Memory provided in this kit is special config for 21.5" ONLY and is NOT compatible with Apple iMac 27" Models. Included memory also compatible with PC Laptops which use DDR4 2133 or 2400 modules.

This OWC Memory is compatible with... Learn how to find your Mac's model ID or PC specs
iMac Intel
iMac w/Retina 4K display
(21.5-inch Mid 2017)
(June 2017)
Model ID:iMac18,2
3.0GHz i5, 3.4GHz i5, 3.6GHz i7
iMac Intel
iMac (21.5-inch Mid 2017)
(June 2017)
Model ID:iMac18,1
2.3GHz i5
OWC Memory 16.0GB 2 x 8GB PC4-19200 DDR4 Kit Mfr P/N: 2421DDR4S16K MacSales.com SKU: OWC2421DDR4S16K OWC Memory Upgrade Kit Lifetime OWC Limited Warranty Ships: Same Day Only $266.83Matched Kit for $229.99
Add to CartOther World Computing 2421DDR4S16K In Stock, Click to Buy Now
Additional Capacities & Kits: Kits w/ Pick + Adhesive Only
  • 16GB (2x8)
    • Ships: Same Day
    • Only $238.96
    • Matched Kit for $219.99
  • 32GB (2x16)
    • Ships: Same Day
    • Only $376.95
    • CyberSaver $298.00
Kits w/ Tools
  • 16GB (2x8)
  • 32GB (2x16)
    • Ships: Same Day
    • Only $396.83
    • CyberSaver $304.00