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

Works perfectly with iMac (Retina 5K, 27-inch, 2019).

Works fine on a PC laptop as well. I popped this into a Dell gaming laptop that came with 12GB RAM (1x8GB + 1x4GB). The laptop went into dual channel mode once installed and the RAM performs well and as expected. If this SODIMM is cheaper than ones marketed for PCs (as it was at the time I purchased it) get this one and save some $$$.

Took some re-arranging of the RAM slots - but works perfectly.

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

Upgraded my new 2017 iMac with 32 gigs and love the performance and headroom.

What else is there to say? Easy and cheap plug and play memory for the mac mini.

After I had returned it as defective because it wouldnt work alongside my preinstalled RAM, I read a review (or a comment on a review, I cant remember which) stating that the key is to install the preinstalled RAM in slots 1-2 and this RAM in slots 3-4. In other words, instead of keeping the preinstalled RAM in slots 1 and 3 and adding this in slots 2 and 4, you must keep each of the the two different memory types together. I ordered it again and, sure enough, it worked the first time. This seems like such a critical piece of information that I wish Crucial would highlight it on the product page here on Amazon.

Awesome product and easy to install!

Fast and easy install, great quality.

Easily installed, recognized by my iMac 27 immediately