[donatj]

I had this happen a couple times to my iMac. The worst time I went on a week long vacation and my screen never went to sleep.

I used to use this program that flashed the screen white and black rapidly and it would clear it up in about an hour.

Haven’t seen any trouble in a few years, is this a solved problem now?

[yreg]

I have a 2017 5K iMac and don't use screensaver. Just a few weeks ago I noticed that the Dock and menu bar is very slightly burned in.

[cwizou]

Yep, there are two different 5K panels on iMacs, off the top of my head LG and Samsung, and the LG one does have slight transient burn in.

It's not "true" burn-in (like CRTs or OLED) as it goes away after a bit but it's fairly easy to trigger with the current trend of very white/light grey designs in macOS, the easiest way to notice it is move from a whitish area to a mid grey one (Daring Fireball is a great example of that problematic grey).

I also have been unlucky on that draw on my 2015 iMac. I barely noticed it at first but newer macOS versions have made it very noticeable sadly. One more reason to run Aerial ;)

[yreg]

Bingo, Daring Fireball on fullscreen shows my burn-in in the full glory.

[kergonath]

Can’t recall any burn-in with recent LED displays. AFAIK it is an issue with OLED ones still.

[Arrath]

Sure is. My Galaxy S7 has the keyboard and some of the WhatsApp top bar interface (from texting my wife so much) burned in.

[kergonath]

Weren’t these OLED, though?

[Arrath]

> "AFAIK it is an issue with OLED ones still"

Indeed they are, I was confirming your recollection that the issue affects OLED screens.