In an internal memo this week, obtained by MacRumors, Apple informed service providers that it’s aware of — and is investigating — an issue that may result in “pink squares or pixels” appearing on displays connected to an M1 Mac mini.
Apple hasn’t provides a specific timeframe for a fix, but, in the meantime, says to follow these troubleshooting steps:
° Put the Mac mini to sleep.
° Wait two minutes and wake the Mac mini.
° Unplug the display from the Mac mini, and then plug the display back in.
° Adjust the display’s resolution in System Preferences > Displays.
If the issue reoccurs after restarting the Mac mini, repeat these steps.