I can't seem to find a definitive answer. ^ Thats the first adapter I found, there might be ones with better reviews out there. Seagate BarraCuda 1TB Internal Hard Drive HDD 2.5 Inch SATA 6 Gb/s 5400 RPM 128MB Cache for PC Laptop (ST1000LM048) is compatible to replace my original internal hard disk that came in my Mackbook Pro (MD101ll/a) mid 2012 model. QNINE SSD Adapter Card for 2012 Macbook Air and Pro Retina, HDD Hard Disk Drive Converter to 2.5 SATA Support 2012 Year Model A1465 A1466 You can upgrade the storage of those models with any SATA M.2 AHCI SSDs - e.g Crucial MX500 sata M.2 - and M.2 to Apple 6+12 adapters. We have a RAM and SSD upgrade for every Apple model, click here and find your model. The PCIe M.2 format looks very similar to the SATA M.2 format but it won't work. 512GB SSD Contain Gift Compatible With MacBook Air A1465 A14 Solid State Drive Mac HD 512G Hard Disk EMC2558 EMC2559 MacBook Air & Pro & iMac & IPOD. They are definitely not compatible with M.2 PCIe SSD. “These two models above come with a M.2 AHCI SATA SSD and use a SATA interface. To clarify, any mSATA drive (which looks like NVMe, albeit mSATA has an additional notch) will work. 45K views 2 years ago MacBook Pro/PowerBook Installation Videos SSD Flash Storage Options For Your Mac: In this video, we show you how to upgrade or. I also misspoke with regards to the drive, NVMe is incompatible (apologies, first time encountering 2012 Retina MBP SSD Upgrades, had assumed since the port is similar it would be the same :/ )

No problem! And apologies if the linked video was misleading, I included it to highlight the installation procedure.

Macbook pro mid 2012 ssd compatibility