Crucial RAM 64GB Kit (2x32GB) DDR4 2666 MHz CL19 Memory for Mac CT2K32G4S266M

My 2017 IMAC failed to boot while this memory was installed. I tried moving the memory around to different slots. 1& 2, then 3&4, then 1&3, then 2&4. Nothing worked. I ensured the memory was properly installed. After I removed the Crucial memory the mac now boots properly.

Installed in a new iMac 27. Installed in the empty slots and it fired right up.

Works fine on a PC laptop as well. I popped this into a Dell gaming laptop that came with 12GB RAM (1x8GB + 1x4GB). The laptop went into dual channel mode once installed and the RAM performs well and as expected. If this SODIMM is cheaper than ones marketed for PCs (as it was at the time I purchased it) get this one and save some $$$.

Definitely improved the performance of my iMac. Only took several minutes to install.

Got this RAM for my 2017 27” iMac. Super easy to install and works perfectly. One of the best prices I could find.

I bought this memory for the new 2017 27” iMac with the i7 processor. Since the Crucial memory selector was did not list this computer, I was a bit concerned about it being the correct match. After an email from Crucial confirming it was the proper memory, I ordered it. When I returned home with my new iMac, I installed the memory and turned it on for the 1st time and everything worked like a charm.

Exactly what is described. Gave me the most RAM Ive ever had in a computer and works great!

Works perfectly with my Imac 27

installed in a 2017 5K imac in the spots where the original ram was, and i moved the original ram to the other spots. No problems at all, didnt have to press too hard like some have stated. Mac booted up no problem the first time and recognized all the ram 8+8+4+4 for total of 24GB.

works like a charm. my Laptop is now supercharged and really fast together with the SSD!