
Decided to try this on my 2017 21.5" iMac as I disassembled it to still upgrade your RAM. Taking apart an iMac was very tedious, but I followed the instructions I found online and took my time. The adapter and drive fit my motherboard perfectly. I was able to install macOS Mojave using the USB installer. I used a 2TB Samsung 970 Evo m.2 SSD. I'm now getting consistent read and write speeds of around 2500MB/s. That being said, this will NOT work on a base 21.5" iMac as that version does not have an SSD connector soldered to the motherboard. If you have a Fusion Drive or your iMac is specifically configured with an SSD, this adapter should work. Just take the time to disassemble your iMac as there are a lot of flimsy cables.

External sound card Focusrite Scarlett 2i2 3rd Gen
16 Review

π¦ FIDECO 3.5/2.5-Inch Hard Drive Enclosure Case with Fan, USB 3.0 to SATA Adapter for HDD & SSD External Hard Drive - Supports 16TB with UASP
12 Review

Hard Shell Case with 5 Attachment Slots for Hyperice Hypervolt Bluetooth, Portable Storage Box for Hypervolt Portable Massage Gun - Case Only
11 Review

1 TB External SSD Samsung T7, USB 3.2 Gen 2 Type-C, grey
15 Review

Smartphone Samsung Galaxy A50 4/64 GB, 2 SIM, black
82 Review

Renewed Logitech G PRO X Wireless Lightspeed Gaming Headset with Blue VO!CE Mic Filter for Immersive Gaming Experience
122 Review

Apple AirPods Pro MagSafe RU Wireless Headphones, White
159 Review

Enhance Your Visual Experience with Logitech C260 Webcam
78 Review