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Internal Drives

Western Digital Scorpio: Kernel Panics (Sudden Motion Sensor)

Kernel panics have sometimes been reported by MacBook and MacBook Pro owners who installed Western Digital Scorpio hard drives. This problem is caused by a conflict between Apple's Sudden Motion Sensor or SMS, and the built-in motion sensing technology on...

Hard Drives & SSDs: Not Visible on OS X Desktop

The most common reason a new drive will not mount to the Desktop is when it has not been properly formatted yet. You can use the built-in Disk Utility from OS X to accomplish this simple task. Please see the Apple document below for more information. ht...

Mac: Hard Drive and SSD Installation Instructions

OWC provides a variety of hard drive, SSD, RAM and optical bay installation videos, located here: http://eshop.macsales.com/installvideos/ [http://eshop.macsales.com/installvideos/] ...

Hard Drives & SSDs: Hard Drive Cache

The Cache in a modern hard drive (or HDD) acts as a type of buffer between the CPU and the mechnical parts inside the hard drive. The buffer is needed because the CPU is far more efficient at moving data than the drive is. By adding onboard cache (which u...

Hard Drives & SSDs: SATA Jumper Settings

While modern SATA drives no longer ship with jumper pins, some of the older models do have jumper pins on the back. However, SATA drives do not require any jumpers to be set manually set. The system will auto-assign an appropriate ID to the drive once it ...

Data Doubler: Adding an SSD to 2012 Mac Minis (Fusion issue)

If your Mac Mini shipped with 10.8.1 preinstalled, you can add a Data Doubler and SSD via our documented instructions. These Mac Mini's shipped with Disk Utility version 428 or 430. If the Mac Mini shipped with 10.8.2 preinstalled, you should NOT use Disk...

Data Doubler: Which Model is Right for My Mac?

There are several types of Data Doubler [http://eshop.macsales.com/shop/drive_bracket/datadoubler/]; each is designed for a specific range of Mac computers. None of the Data Doublers should be used with Mac models that are not specifically listed on their...

Aura and Mercury SSDs: Windows Firmware Updater Not Recognized

The Windows-based firmware updater for OWC SSDs requires that the SATA controller be set to AHCI. If it is set to IDE (Legacy) or RAID, the firmware updater will not be able to see the drive. This setting can be changed in the computer's BIOS, under Integ...

Windows XP: Formatting Drives

For instructions on how to format a hard drive using Windows XP, please check the link below. https://support.microsoft.com/en-us/kb/309000#bookmark-5...

Hard Drives & SSDs: Newly Installed Drive Not Available

Before you can install Mac OS X onto your newly installed drive (or Migrate data to it), make sure the drive is partitioned and formatted properly. Open the Disk Utility and follow these steps: 1. Select the disk in the sidebar at left then click the Pa...

Hard Drives & SSDs: Compatibility - 12.5 mm Drive Height

Generally, you can use 2.5" HDDs or SSDs with a 12.5mm form factor inside any "unibody" MacBook or MacBook Pro that DOES NOT HAVE a Retina Display. Retina display models typically use proprietary blade-style SSDs and consequently do not have a traditional...

Professional Data Recovery Options (DriveSavers)

If you have already contacted Technical Support [http://eshop.macsales.com/Service/contact/] and are still having trouble accessing information on a drive(s) purchased from OWC, you may want to consider working with one of our professional data recovery p...

Mac: Reconnecting the Airport Antenna (Mac Mini)

After installing an SSD or a memory upgrade into an Intel Mac Mini, it can be difficult to remember exactly how to reconnect the airport antenna. The best solution is to the detailed installation video for your specific Mac Mini model - they are listed be...

OS X: Apple Partition Map vs. GUID Partition Table

There are two types of partition map schemes available on the Mac; once applied they will determine some of the drive's capabilities. APPLE PARTITION MAP (APM) 1. Seen and usable on all PowerPC and Intel based Mac machines. 2. Bootable only on Pow...

OWC Custom Drive Icons

If you would like to use one of our custom icons with your drive(s), please use the page linked below. It contains large thumbnails depicting all the icons, as well as instructions for how to add the icons to your drive's on-screen appearance. http://es...

Hard Drives & SSDs: Actual Formatted Capacity

When formatted, all drives will be recognized as having less space available than the number of GB or TB designated in the product name. The reason for this is that operating systems consider 1GB to equal 1,024 bytes, while manufacturers consider 1GB to b...

Hard Drives: Identifying Unusual Noises

While all hard drives will exhibit some mechanical noises when reading or writing data (and some are definitely louder than others), sometimes you may hear some unusual noises which you cannot positively identify (either the noise or its cause). In cases ...

Mac: Disk Utility Secure Erase

If you need to securely erase a hard drive or SSD, you can use the OS X / macOS Disk Utility to perform this task. * Open the Disk Utility. * Using the Sidebar, select the volume you wish to erase. * Click the Erase tab. * Choose a drive format ...

Mac OS: Migrating Data to a New Drive

There are several ways to move data between OS X system drives; which method is best for you depends on your hardware and system version, and on whether the drives are functioning normally. If you haven't experienced any problems with your original drive ...

Mac: Thermal Sensor Orientation (Late 2009 iMac vs. Late 2010 iMac)

The attached graphic shows the difference in orientation when connecting the thermal sensor to a hard drive in the Late 2009 iMac vs. the Late 2010 iMac.   ...

Spotlight and Time Machine: Impact on Application Performance

Unless you have disabled it, occasionally the Spolight indexing feature in OS X will run in the background when you are using other applications. Spotlight indexing can (for a brief time) cause other applications that are running -- including benchmark so...

Mount Pro: Compatibility

Occasionally we are asked why the Mount Pro will not work in 2006, 2007, or 2008 Mac Pro models. At a glance, the native drive sleds in those models might look the same as those found in the 2009, 2010, and 2012 models. However they are not the same. Th...

Mercury Accelsior E2: Mac Boot Limitations

APPLICABLE PART NUMBERS: OWCSSDPHWE2R960, OWCSSDPHWE2R480, OWCSSDPHWE2R240, OWCSSDPHWE2R120   * The Accelsior E2 is not compatible with Boot Camp.  To use Windows on a Mac with the Mercury Accelsior E2, you must first boot to a Windows installer and...

Mercury Accelsior E2: Performance Requirements

  APPLICABLE PART NUMBERS: OWCSSDPHWE2R960, OWCSSDPHWE2R480, OWCSSDPHWE2R240, OWCSSDPHWE2R120   PC Requirements: A PCIe 2.0 slot with four, eight, or 16 lanes (sometimes referred to as x4, x8, or x16) is required for maximum performance. Using a P...

Mercury Accelsior E2: Multiple Card Requirements

APPLICABLE PART NUMBERS: OWCSSDPHWE2R960, OWCSSDPHWE2R480, OWCSSDPHWE2R240, OWCSSDPHWE2R120   The use of two or more Accelsior E2 SSDs in a Mac Pro requires OS X 10.6.8 or later....

Apple Boot Camp: Installing on High Capacity Disks

PROBLEM Mac owners using disks that exceed 2.2TB may find it difficult to set up a Windows disk using Apple's Boot Camp assistant. The root cause of the problem is that the Boot Camp Assistant uses the FAT32 format when setting up a Windows disk. The en...

Data Doubler: 2009-2011 iMac Install Tips

If you have one of the iMacs listed below, and you are replacing the optical drive with an Data Doubler and a 2.5" SATA drive, note that there is a thermal sensor about the size of a dime which is attached to the optical drive. It can be removed, then att...

Mercury Elite Pro Dual: Seagate Drive Compatibility

Relevant Part Numbers: OWCTB2U3MEDxxx OWCMED3ERxxx DRIVE MODEL: ST8000NM0055 DRIVE PART: 1RM112-102   Currently the OWC Mercury Elite Pro Dual (Thunderbolt 2 / USB 3.1 Gen 1) and Elite Pro Dual (USB 3.1 Gen 1 / eSATA) are not compatible with spe...

OWC Enclosures & Drive Docks: 4Kn Drive Compatibility

CURRENTLY MOST OWC STORAGE SOLUTIONS DO NOT SUPPORT NATIVE 4K (4KN) HARD DRIVES; ONLY THE OWC THUNDERBAY 4, OWC MERCURY ELITE PRO QUAD, OWC RACK PRO MINI-SAS, THUNDERBAY 4 MINI (LEGACY PRODUCT), THE UPCOMING OWC THUNDERBAY 6, AND OWC'S JUPITER ENTERPRISE ...

Mercury SSDs (High Capacity): Accelsior S, Mac Pro Compatibility

APPLICABLE PART NUMBERS AS OF JUNE, 2017: OWCSSD7E3G02S OWCSSD7E6G02S OWCSSD7P6G02S OWCSSD7P6G960 (legacy model) OWCSSD7P6G480 (legacy model) OWCSSD7E6G02T (legacy model) OWCSSDACL6G.S (Accelsior S) Please note that when using the Mercury Accelsior S wit...

NewerTech AdaptaDrive: Xserve Drive Trays

If you are using the NewerTech AdaptaDrive to seat a 2.5 inch SSD into an Xserve drive bay, please use the drive tray that came with the Xserve to ensure the AdaptaDrive and SSD are properly recognized and available to the system....

OWC Enclosures, Drive Docks, & SSDs: FileVault and BitLocker Support (2017)

As of April 2017, all current OWC storage enclosures, storage docks, and SSDs tested as compatible with Apple FileVault and Windows BitLocker. Tests were run on a variety of host hardware and operating systems including Windows 8.1 Pro, Windows 10 Pro, Ma...

Mercury Elite Pro (U3/FW800): Seagate Drive Compatibility

RELEVANT PART NUMBERS: OWCME3QHKIT0GB, OWCME3QHKITSW   UPDATE: 08/25/17   Please note that the following drives should now work with the Mercury Elite Pro enclosure, but only after a firmware fix has been applied by OWC. Please contact Customer ...

OWC SSDs (PCIe): Changing the Drive Icon

RELEVANT PART NUMBERS: OWCSSDAB2MB02 OWCSSDAB2MB05 OWCSSDAB2MB10  OWCSSDA13MP1.0 OWCSSDA13MP2.0 OWCSSDA13MP4.0  OWCSSDPHWE2R120 OWCSSDPHWE2R240 OWCSSDPHWE2R480 OWCSSDPHWE2R960 BACKGROUND Please note that when any of the drives listed above are in...

Mac: High Sierra — Unformatted Disks Not Visible (Disk Utility)

Please note that for the initial release of macOS 10.13 (High Sierra), unformatted drives may not show up in the Disk Utility drive list. This applies to both internal and external drives. One possible solution is to access the main menu and choose View >...

Aura Pro X SSDs: 10.13 Requirement

RELEVANT PART NUMBERS: OWCS3DAPB4MB02 OWCS3DAPB4MB05 OWCS3DAPB4MB10 OWCS3DAPB4MB20   OPERATING SYSTEM AND HOST REQUIREMENTS * Please note that the Aura Pro X series of SSDs not only require the use of macOS 10.13 High Sierra (or later) as the in...

Aura SSDs: Firmware Update (beta)

IMPORTANT: * This firmware update process is beta status. Please be aware that no firmware update process is 100% without risk, and that it is important to follow the instructions as they are presented here. If you have questions please contact our awa...

Mercury Accelsior Pro Q: 10.13 Driver Warning

RELEVANT PART NUMBERS: * OWCSSDPHWQ480 * OWCSSDPHWQT1.0 * OWCSSDPHWQT2.0   Occasionally, customers running macOS 10.13 High Sierra may encounter an issue with the Mercury Accelsior Pro Q, where the drive does not appear to mount but is shown in...

Mercury SSDs (Electra 6G): Synthetic Benchmark Performance

RELEVANT PART NUMBERS: * OWCSSD7E6G060 * OWCSSD7E6G120 * OWCS3D7E6G250 * OWCS3D7E6G500 * OWCS3D7E6GT1.0 * OWCSSD7E6G02S   Occasionally, customers will ask us why they see noticeable drops in write performance when running a data-intensive...

OWC SSDs: SLC Mode Background

OVERVIEW Please note that starting in 2017, many OWC SSDs include a feature known as "SLC Cache Mode." THESE DRIVES DO NOT CONTAIN SLC FLASH MODULES. Rather, they contain either MLC or TLC flash modules as well as a flash controller capable of providing ...

Aura for 2013 Mac Pro: 10.13.4 and Later Install Issue

Last Updated June 27, 2018   RELEVANT PART NUMBERS: * OWCSSDA13MP1.0(K) * OWCSSDA13MP2.0(K) * OWCSSDA13MP4.0(K)   Please note that currently, it is not possible to install macOS 10.13.4 or later onto a new Aura for Mac Pro, using the standa...

OWC Express 4M2: Drive Compatibility

OVERVIEW The Express 4M2 enclosure only works with NVMe (PCIe 3.0) SSDs. SATA M.2 drives will not function if installed. Note that you cannot distinguish an NVMe M.2 drive from a SATA-based drive just by looking at the M.2 connector key. Both types of...

Aura Pro X2 SSDs: Boot Camp Compatibility

Please note that the Aura Pro X2 SSD is not compatible with Boot Camp when installed in any of the following Mac hosts: * MacBookPro11,1 * MacBookAir6,1 * MacBookAir6,2 * iMac15,1 (Late 2014) * iMac18,2 * iMac18,3 * iMac19,1 * iMac19,2 ...

Aura N SSDs: Boot Camp Compatibility

Please note that the Aura Pro N SSD is not compatible with Boot Camp when installed in any of the following Mac hosts: * MacBookPro11,1 * MacBookAir6,1 * MacBookAir6,2 ...

Aura Pro X2, Aura N SSDs: Boot Times

RELEVANT PART NUMBERS: * OWCS3DAPT4MB02 * OWCS3DAPT4MB05 * OWCS3DAPT4MB10 * OWCS3DAPT4MB20 * OWCS3DAB2MB02 * OWCS3DAB2MB05 * OWCS3DAB2MB10 * OWCS3DAB2MB20 Please note that if you are using the Aura Pro X2 or the Aura N SSD WITH A 2013-2...