2014 A1398 MacBook Pro Died: Use the Right SSD Adapter Before Trying Data Recovery
Yes, the SSD in a 2014 A1398 Retina MacBook Pro can be removed, but no, it should not be treated as a normal M.2 SSD and inserted directly into a standard gaming-PC M.2 slot. The safer route is a compatible enclosure or adapter, preferably connected to another Mac.
The original plan in this A1398 recovery thread was to remove the SSD, install it on a PC motherboard, boot from it, and copy the files. The key correction is hardware compatibility before any recovery software is involved.
The 2014 A1398 SSD Is Removable but Proprietary
iFixit’s Mid-2014 15-inch MacBook Pro SSD guide confirms that this generation uses a proprietary storage-drive connector and is not compatible with common M.2 drives without an adapter. The A1398 mid-2014 models are also listed with a separate removable SSD module.
That means the recovery path is: remove the Apple blade SSD carefully, place it in an enclosure or adapter specifically compatible with the Late-2013/Mid-2014 Retina MacBook Pro SSD, then attach it as a secondary drive. Do not make “boot from the old SSD” the goal; first see whether the files can simply be read and copied.
Use Another Mac If You Can
A newer Mac is usually the simpler host because it can natively handle Mac file systems that Windows may not read without additional software. If the SSD mounts, copy the most important folders to a separate healthy drive first. If FileVault was enabled, you may need the correct account password or recovery credentials to unlock the volume.
Stop Here If Detection Is Unstable:
If the SSD is not detected through a known-compatible adapter, repeatedly disconnects, or reports obvious hardware errors, do not keep power-cycling it. That changes the problem from file access to hardware recovery.
If the SSD Is Readable but Files Are Missing
Once the SSD is detected stably and the volume is readable or unlockable, Recoverit Mac File Recovery can scan for missing or deleted files and save recovered results to another drive. It cannot make a physically undetected SSD readable, so solve the adapter and detection question first.