Aaron Bockover on Twitter: "The screen burn in on this 4yo 5K Retina display iMac is so bad that I can clearly read everything I was doing before I had to forcibly
Intel iMac 27″ developing dirty, dark spots and patches on the screen : The zombie problem that just won't die! | The Nanchatte Technojunkie
SOLVED: Will mid 2017 iMac 5K get dust in the screen like the previous models? - iMac 27" 2017 - iFixit