Features: 1. 2010 2011 2012 version 27-inch and 21.5-inch for A1419 A1418 cannot be used! 2. Some for IMACs only support PCle x2 data transmission mode! This is due to the machine, not the adapter card. 3. Applicable for NVMe PCIe M.2 to 2013-2017 Pro SSD adapter card tool 4. The 2013 version of for the all-in-one computer iMACA1418 (note EMC: 2638) and the 2017 version iMACA1418 (note EMC: 3069) can be combined with Drive. In other words, the 21-inch from 2013 to 2017, if for your can be combined with Drive , that means it can definitely be used, but before replacing the hard drive, you must first deactivate the Drive). 5. 2013-2017 version 27-inch A1419 can be used. Description: 1. Type: NVMe PCIe M.2 To 2013-2017 2. Type: Adapter Card Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use With the words "; 2013-2017 ; NVME N-941A; 191002" Material: PCB colour: As Shown Package Contents: 1 x Adapter Card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.