Apple - How to mount PCIe SSD from MacBook Air in another computer

The physical interface(s) or form factor(s) are Apple proprietary. The different SSDs have 6+12/12+16/8+18/7+17 pins. The electrical/logical interface is PCIe 2.0 2x or 4x (everymac.com also mentions SATA for some older MacBook Airs).

Several adapters for different MacBook (Air) SSDs are available here.

Example: MacBook Air Mid 2013 SSD to PCI-e 4X. Please check the specs and features!

I haven't been able to find an adapter for the MacBook Air Early 2015 SSD there. The latest MacBook Air uses a proprietary PCIe 2.0 4x instead of a proprietary PCIe 2.0 2x interface like older MacBook Airs.

the "SNANSHI 2013-2014 Year MacBook Air A1465 A1466 Pro A1502 A1398 MD712 SSD PCI-e 4X Adapter" for $13.99 worked perfectly for me, and I can use the drive as a primary boot drive for my PC. The card is recognized as a SATA device in my BIOS, and it works flawlessly. Good Luck

There is an adapter that would allow you to mount this as an external drive: https://www.amazon.co.uk/pin-28pin-Adapter-2013-2014-Macbook/dp/B014FTKOWA

It is on the expensive side but its USB 3.0 and PnP.