Note: without memory stick Product Overview This Thunderbolt 2 SSD enclosure is a high-performance storage expansion solution designed specifically for 20112015 iMac models. It is also widely compatible with all Mac computers equipped with Thunderbolt 1 and Thunderbolt 2 ports, providing users with a convenient and efficient storage upgrade option. Product Advantages Plug-and-Play: Features advanced plug-and-play technology for easy operation, allowing users to start using it quickly without complex installation procedures. No Disassembly Required: Compatible with mainstream M.2 NVMe SSDs (2230, 2242, 2280). Upgrading your storage does not require opening your iMac, significantly improving data read or write speeds and overall performance. However, the operating system must be installed on the external SSD, reducing the risk of hardware damage from disassembly. Wide Compatibility: Works with all Mac models equipped with Thunderbolt 1 and Thunderbolt 2 ports, including MacBook Air, MacBook Pro, iMac, Mac Mini, and Mac Pro. Technical Specifications Parameter Specification Interface Type Thunderbolt 2 (compatible with Thunderbolt 1) Transmission ProtocolPCIe 3.0 or 4.0 Supported SSD Type M.2 NVMe SSD (2230, 2242, 2280) Maximum Transfer Speed 20Gbps (theoretical) Actual Read or Write Speed 850MB or sand (varies by Mac model) System Requirements macOS 10.13 or later iMac Storage Speed Reference (Mid 2011 Mid 2015) Internal HDD: -100200MB or s Internal 2.5-inch SSD: -250500MB or s Apple Original SSD: -250700MB or s External USB 3.0 SSD: -250450MB or s External Thunderbolt 2 SSD: Up to 857MB or s (tested on Late 2015 iMac A1419, actual performance may vary depending on device and testing conditions) Compatible Devices MacBook Air 11-inch A1370 (Mid 2011) EMC: 2471 13-inch A1369 (Mid 2011) EMC: 2469 11-inch A1465 (Mid 2012 Early 2015) EMC: 2558, 2631, 2924 13-inch A1466 (Mid 2012 2017) EMC: 2559, 2632, 2925, 3178 MacBook Pro 13-inch A1278 (Early 2011 Mid 2012) EMC: 2419, 2555, 2554 15-inch A1286 (Early 2011 Mid 2012) EMC: 2353, 2417, 2563, 2556 13-inch Retina A1425 andamp A1502 (Late 2012 Early 2015) EMC: 2557, 2672, 2678, 2875, 2835 15-inch Retina A1398 (Mid 2012 Mid 2015) EMC: 2512, 2673, 2674, 2745, 2876, 2881, 2909, 2910 iMac 21.5-inch A1311 (Mid 2011) EMC: 2428 27-inch A1312 (Mid 2011) EMC: 2429 21.5-inch A1418 (Late 2012 Late 2015) EMC: 2544, 2638, 2805, 2889, 2833 27-inch A1419 (Late 2012 Late 2015) EMC: 2546, 2639, 2806, 2834 Mac Mini A1347 (Mid 2011 Late 2014) EMC: 2442, 2570, 2840 Mac Pro A1481 (Late 2013) EMC: 2630 Troubleshooting Guide All Thunderbolt 2 SSD enclosures are tested with an SSD installed before shipping to ensure proper functionality. If your device is not recognized, follow these steps: Check macOS Version: Ensure that your macOS version is 10.13 or later. If itand 39 s lower, update your system. Reconnect the Cable: Thunderbolt ports may accumulate dust or oxidize over time. Try unplugging and reconnecting multiple times or using a different port. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store