Review on OWC 16GB (2 X 8GB) PC21300 DDR4 2666MHz SO-DIMMs Memory Compatible With Mac Mini 2018 by Tracy Fleurosier

I removed two 4GB RAM sticks from my new 2019 iMac 3.0GHz i5 and replaced with two 16GB -Sticks replaced by OWC , follow instructions online (it's not difficult but you need to know what you're doing) The computer didn't start I've tried different ways (e.g. different slots) It has Nothing changed. I called Apple, they offered to put Apple back in the next day, try the new OS again it booted with no problems and I installed all the usual software "The next day I tried reinstalling the OWC RAM. Again it didn't work. No doubt it is right there. Also, Apple told me it *should* work (it's stamped 2666 DDR4). It doesn't work however I'll go back and leave this review Try to de-stress for about an hour.