Bought 2 of these for a 2020 iMac at a third of Apple's price and have had no problem with them so far. Planning to get 2 more soon. If you're in the same boat, you should know that the 2 existing 4 GB memory modules that the iMac came with weren't fully compatible with these modules and they were all downgraded from 2666 MHz to 2133, so I ended up removing the 4 GB modules.