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

Easy upgrade with clear improvement in performance.

I used four 16g sticks of RAM to upgrade my new iMac, after having problems with those from a different vendor. These went in effortlessly and the computer didnt throw any codes. I and the computer are now humming along. The Apple tech told me to get Crucial and nothing else. They seem to know what they are talking about.

I bought one 64G kit (32G * 2) to pair with the original 8G (4G * 2). To maintain a dual-channel, the Mac downgrade the memory frequency from 2666 to 2133. So I have to purchase another 64G kit (32G * 2) to achieve dual channel and max frequency.

Imac 27 2020 followed directions in comments for easy install. Works as advertised.

I bought this 16Gb Kit Single Rank for my 2017 iMac 27-inch (Model No. A1419/ MNED2RU/A). Installation took just two minutes! I just inserted the new memory into two available slots. Didnt even see that black ini

Works flawlessly in my 2017 iMac 27”

Work exactly as expected for my iMac 27 model from 2017.

I added the 2x16GB modules to my brand new 2017 iMac 5K (purchased in September 2017) and just like MCannon my iMac would not boot up while the new memory was installed. After removing the memory upgrade and sweating a few bullets, my iMac came back to life.

Working well in my iMac.

Used in previous set-up and did not disappoint again. This product is dedicated for Mac and works flawlessly.