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SSD Upgrade Kits for Mac

JetDrive™ 855

Transcend's JetDrive 855 Thunderbolt™ PCIe portable SSD combines a JetDrive 850 PCIe SSD with a sleek aluminum Thunderbolt enclosure to instantly revitalize your Thunderbolt-equipped MacBook Pro, MacBook Air, Mac mini, or Mac Pro!

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Which model suits you?

Transcend’s JetDrive series includes four models of PCIe SSDs. They are JetDrive 855, JetDrive 850, JetDrive 825, and JetDrive 820. Find out which model suits your needs!

MacBook Pro
MacBook Air
Mac mini
Mac Pro
  JetDrive 855 JetDrive 850 JetDrive 825 JetDrive 820
Interface standard NVMe AHCI
PCIe version Gen3 x4 Gen3 x2
Maximum performance Read 1,600MB/s
Write 1,300MB/s		 Read 950MB/s
Write 950MB/s
System requirements macOS 10.13 or later macOS 10.10 or later
Note With enclosure SSD only With enclosure SSD only
  Learn more Learn more Learn more Learn more

Thunderbolt technology in a sleek case

Transcend's JetDrive 855 features a 10Gb/s Thunderbolt interface, capable of blazing-fast file transfers. The drive is housed in a sleek, aluminum-alloy enclosure designed to tastefully complement your Mac's simple, clean lines. In addition, the inner SSD is removable for more versatile use based on your preferences.

Expand storage in a flash

Upgrading your Mac with a Transcend JetDrive 850 allows you to increase storage capacity to up to 960GB, ensuring you have plenty of space for your documents, photos, music, and videos.

Feel the need for speed

Transcend's JetDrive 850 utilizes the PCIe™ Gen3 x4 interface paired with the latest 3D NAND flash, resulting in compelling performance of up to 1,600MB/s read and 1,300MB/s write*. Transcend's JetDrive 850 gives you fluid, real-time performance for demanding professional tasks, video editing, or 3D graphics rendering.

*Note: Performance tested with AJA v1.0 / Black Magic v3.1.

Gen3 x4

Read up to 1,600MB/s
Write up to 1,300MB/s

Gen3 x2

Read up to 1,500MB/s
Write up to 1,100MB/s

Performance Chart

JetDrive Toolbox

Exclusively developed by Transcend, JetDrive Toolbox helps maintain a healthy and efficient SSD by keeping it up-to-date, preventing functional degradation, and predicting problems before they happen. JetDrive Toolbox clearly displays drive information, S.M.A.R.T. status for possible drive failure, health indicators for estimated lifespan, and facilitates firmware upgrades. It can also identify your Mac model to quickly find out which of our Apple product suits your computer.

All the tools you need

Inside you'll find:

  • JetDrive 855 Thunderbolt PCIe portable SSD
  • Screwdrivers (T5 & P5)
  • Rubber feet
Upgrading a Mac Pro or Mac mini requires additional screwdrivers.

Match it up

Find the right JetDrive model for your Mac.

Mac Model Mac Identifier JetDrive Model
MacBook Air 11" Early 2015 MacBook Air 7,1 JetDrive 855 / JetDrive 850 / JetDrive 825 / JetDrive 820 NEW
Mid 2013 – Early 2014 MacBook Air 6,1 JetDrive 855 / JetDrive 850 / JetDrive 825 / JetDrive 820 NEW
Mid 2012 MacBook Air 5,1 JetDrive 520  
Late 2010 - Mid 2011 MacBook Air 3,1 / 4,1
*480/960GB JDM500 does not support 3,1		 JetDrive 500  
13" Mid 2013 –2017 MacBook Air 6,2 / 7,2 JetDrive 855 / JetDrive 850 / JetDrive 825 / JetDrive 820 NEW
Mid 2012 MacBook Air 5,2 JetDrive 520  
Late 2010 - Mid 2011 MacBook Air 3,2 / 4,2 
 JetDrive 500  
MacBook Pro (Retina®) 13"  Late 2013 - Early 2015 MacBook Pro 11,1 / 12,1 JetDrive 855 / JetDrive 850 / JetDrive 825 / JetDrive 820 NEW
Late 2012 - Early 2013 MacBook Pro 10,2 JetDrive 720  
15"  Late 2013 - Mid 2015 MacBook Pro 11,2 / 11,3 / 11,4 / 11,5  JetDrive 855 / JetDrive 850 / JetDrive 825 / JetDrive 820 NEW
Mid 2012 - Early 2013 MacBook Pro 10,1 JetDrive 725  
Mac mini - Late 2014 Mac mini 7,1 JetDrive 855 / JetDrive 850 / JetDrive 825 / JetDrive 820 NEW
- Mid 2010 - Late 2012 Mac mini 4,1 / 5,1 / 5,2 / 6,1 / 6,2 JetDrive 420  
Mac Pro - Late 2013 Mac Pro 6,1 JetDrive 855 / JetDrive 850 / JetDrive 825 / JetDrive 820 NEW
MacBook Pro - Late 2008 - Mid 2012 MacBook Pro 5,1 / 5,2 / 5,3 / 5,5 / 6,1 / 6,2 / 7,1 / 8,1 / 8,2 / 8,3 / 9,1 / 9,2 JetDrive 420  
MacBook - Late 2008 - Mid 2010 MacBook 4,1 / 5,1 / 5,2 / 6,1 / 7,1 JetDrive 420  
  • The JetDrive series is compatible with certain Mac models. Please identify your Mac model here.
  • The JetDrive 855 is only compatible with devices running macOS High Sierra (10.13) or later. Please upgrade your macOS to High Sierra (10.13) before the installation. If your Mac model cannot be upgraded to macOS High Sierra (10.13), please use Transcend's JetDrive 825 instead.
  • The native SSD of the 11-inch MacBook Air Early 2015 is only compatible with macOS when it is used as external storage.
  • The 480GB / 960GB JetDrive 500 is not supported by the 11-inch MacBook Air Late 2010 model due to mechanical limitations.
  • Apple, Mac, MacBook Pro, MacBook Air, Mac mini, Mac Pro, and Retina are trademarks of Apple Inc.

Specifications

Appearance
Dimensions (Max.)120 mm x 31.5 mm x 18.2 mm (4.72" x 1.24" x 0.72")
Weight (Max.)88 g (3.10 oz)

Interface
Connection Interface
  • Thunderbolt 10 Gb/s

Storage
Storage Media
  • NVMe PCIe Gen3 x4 SSD
Capacity
  • 240 GB
  • 480 GB
  • 960 GB

Operating Environment
Operating Temperature0°C (32°F) ~ 60°C (140°F)
Storage Temperature-40°C (-40°F) ~ 85°C (185°F)
Operating Voltage
  • 15V

Performance
Note
  • Speed may vary due to host hardware, software, usage, and storage capacity.

Warranty
Certificate
  • CE
  • FCC
  • BSMI
Warranty
  • Five-year Limited Warranty
Warranty Policy
  • Please click here for more information about the Transcend Warranty Policy.
  • Warranty does not apply when JetDrive Toolbox's wear-out indicator displays 0% within the warranty coverage.

Order Information

240GB
  • TS240GJDM855 macOS 10.13 or later
480GB
  • TS480GJDM855 macOS 10.13 or later
960GB
  • TS960GJDM855 macOS 10.13 or later

Product Sheet

View or download the product sheet for detailed product and ordering information.

Support

Find drivers, manuals, FAQs, or software updates for your product.

Compatibility

Check the compatibility of your Transcend product with your computer system or electronic devices.