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

works great, recognized immediately. ZOOM!

As described. Works great!

So I got the 5k imac when it first came and... i went cheap on the ram because I knew you could add more later. so now was the time, sierra went to mojave and my photoshop started crapping out on me. i knew i needed more ram especially working with larger files. the radeon pro 580 8 gb was ok, i knew i needed more ram. i got 8gb, 4+4. so i got these, 16gb+16gb. now I have 49 GB total. works great. it made a huge difference, im waiting for the price to drop and getting 2 more.

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

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.

Compatible, easy to install, flawless operation. I’ve come to expect that from Cruicial, whenever I perform all the necessary due diligence to make sure I’m getting the right ones, they just work.

Easily snapped into my iMac and made a huge difference in its ability to handle large files, especially Photos. Previous RAM was only 8 Mb. Obviously, it’s important to get the right RAM for your model. Also good to have an antistatic tool.

Received these straight away after returning the Corsair. These passed the built in diagnostics in my iMac, and so far I havent had any issues with crashing. About this Mac is showing 40GB as I have 8GB of stock Apple RAM. Ive installed the RAM as follows:

Multitracking recordings is now easier than before.

The OSX picked up the additional memory and is working great