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

Never encountered kernel panic on macOS since I installed Crucial, no problems manifested in any apps nor games. In contrast with my previous purchase (Corsair Vengeance) where I encountered too many problems: https://www.amazon.com/gp/customer-reviews/R2E1GCR7WT4DWB?ref=pf_ov_at_pdctrvw_srp

This RAM is not compatible with the factory Apple RAM in my 2017 3.8 GHz Intel Core i5 iMac. I contacted customer support and I was told I could run one or another but not both together as they are not compatible, apparently they are different frequencies? This is hugely disappointing.

Bought to upgrade total memory in a new imac from 8 to 24... easy to install and worked Beautiful.... UNFORTUNINATELY----IMAC was a Rotten Apple... Returned to APPLE---AND HAVE HAD TO EAT THE MEMORY....MY LOSS.!!

Worked like charm.

Hi All,

Ever since someone told me about the memory product call Crucial many years ago, Ive purchased only this brand of memory.

I bought the CT2K8G4S266M as suggested by crucial and it is perfect. Install was flawless (thanks apple) and ram is great! Instantly recognized on boot up and Mac is never lagging or hanging now. This is the ram to boost your iMac performance, worth every cent!

Oh boy. I thought I had ordered the wrong ones because they came with a sticker that read NOTEBOOK. Since it said on here that it does work for the 2017 27inch iMac 5k, I decided to go ahead. After I installed and tried to turn on, I felt the machine running but I only received a black screen. Luckily I came across a forum that stated that you must press them in more firmly than expected and, sure enough, they werent fully in.

I just brought a 2017 iMac refurbished 27 with 8 GB of Ram. Crucial RAM 32GB Kit (2x16GB) install in minutes and it made my MAC run incredible. and I purchased it at only$109 on Amazon day.

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