So I thought this was going to be easy, I'll go to Crucial.com and type in "iMac 2019". Except they don't have any compatible RAM for this machine. So I'm like... okay, I'll just search manually! Let's see the list for Mac computers... There isn't a single one that's 2666 Mhz. Okay, don't panic, surely other brands have RAM like that... Kingston does... Except I have bought 4 Kingston drives in the past and every single one of them have failed. So I will not buy anything from them again. What else is there? I'm seeing this, which is the Corsair DDR4 2666 32GB Vengeance RGB PRO CL16 KIT (2x16GB). Will this work? Apple says this about compatible RAM: " Use Small Outline Dual Inline Memory Modules (SO-DIMM) that meet all of these criteria: PC4-21333 Unbuffered Nonparity 260-pin 2666MHz DDR4 SDRAM" How am I supposed to know if they match all this criteria? No website ever talks about memory being unbuffered, nonparity, and the PC4-21333 thing. I have no idea what they mean. The only info about the RAM is that it's DDR4 and 2666 MHz, that's all. And based on the photo I can tell it's likely the right size, though I don't know how to be sure. Then there's this on Amazon, except it's "PC4-21300" and not "PC4-21333". I also can't tell if it's unbuffered and whether if it has nonparity. Whatever that means. I thought this was going to be easy. Can you recommend me 2x16GB of RAM for the iMac 2019 that's available in Europe? Ideally from a good brand? Thanks!