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

This was a lot more difficult then it should have been. I plugged in the memory as per instructions on line, and to my suprise the computer would not boot. I then tried the memory without the apple memory that was already in the computer and it worked. So I tried it in different slots. The only way it would work was with the Crucial memory in slots 1 and 2 and the apple memory in slots 3 & 4. It works but not sure if this is ok or not. So far so good! All the memory show in about this Mac so Ill leave it alone.

Installation was easy and effortless. Works well with my 27inch iMac.

Besides the wait, everything seems to be A1. I opened the package slapped these puppies in and TA- tothe-DA my iMac recognized them as for increase in speed and longevity I’ll be updating reviews in a couple weeks

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.

Good price, fast delivery, super easy installation, happy 40 GB iMac, very happy owner/user.

Perfect for my iMAC MNED2LL/A. Easy as 1,2 and 3. No issues. I installed the memory and it booted right up. I didnt have to rearrange the pre-installed memory or anything. I installed them and they worked! Awesome! Good price too.

Plug and play installation with 2017 5k imac. Works just fine.

What a palaver! I put the new memory into the empty slots in my iMac, turned on the computer and it was completely dead. Just a very faint hum. Very long story short, I had to separate the new memory from the old. ie New memory in slots 1 and 3, old memory in slots 2 and 4. It took me nearly an hour of tech support to figure this out.

I have ordered 16GB kit for my 2017 IMAC and installed it the other day and everything is working fine. The installation was very easy and it took me only 10min to install the memory and my IMAC now has 24GB RAM. So far everything is working fine! Very solid product!

Installed the two 16GB cards in the two empty slots of my 2017 iMAC and left the two OEM 4GB cards in the other two slots. The install was easy and it recognized the new memory for a total of 40GB without any problem. A month has now passed with daily use and everything has worked flawlessly.