Review on 💾 16GB A-Tech RAM Upgrade Kit for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010 27 inch 4-Core, Mid 2011 21.5/27 inch), Mac Mini (Mid 2011) - DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory by Brandon Guidroz

I bought 2 sets of 16GB, one finally worked and the second one is still showing errors. I installed the first set on 3 MACs (Mac Mini, Macbook Pro and Imac), all of them came back with a RAM error (3 beeps). Then I installed it on an HP laptop and it worked, put it in there for a day and for some reason when I installed it again on the Mac (got it) they worked. I finally got the second set (they were ordered 24 hours apart) but this one doesn't work on either a Mac or an HP laptop. Terrible quality control, I have no idea how they got over 550 5 star reviews. I have previously bought 2 major 16GB sets and they have never given any problems but these are totally unreliable.