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

Simple to install the memory into the empty slots on the 27 iMac and you have 40 GBs of Ram. Just make you can feel it pop in. Check the Apple menu, About The Mac, Memory 40GB. Easy and perfect.

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

Working as described

I bought a 27 iMac at Costco that only had 8GB in it. With 24GB, its now noticeably faster. These installed in about 10 minutes, no problem.

I installed this memory to a 2019 imac 27in model with Intel i5 3.7 processor. Very easy to install....just make sure you line up the notches correctly when you put them in the slots. I had the base 8gb memory, added 32gb, now my computer is showing 40gb ram total at 2667. Very happy with the purchase and certainly cheaper than Apple prices for ram.

Alien-ware 15R doubled RAM, Son is very happy and says games are better.

An easy and useful upgrade to iMac for a great price.

Works nicely with my new iMac

Works perfect in new iMac at a fraction of the price. Im shocked Apple still allows this. Ive been using Crucial for years and their stuff is great.

I added one of these 8GB RAM modules to my Apple iMac 27 5k and one to my friends identical iMac. An increase in response speed is noticeable in both. This 8GB module increased RAM from 8 to 16 GB. Install was easy and quick with no problems. I have one more slot available for another module if I want to add more in the future.