A mysterious problem has been reported by some owners of the new M1 Mac mini. Affected users see unwanted pink squares or pixels on the connected display, which of course is not optimal.

It seems that the problem, reported by MacRumors, is more common when connecting via HDMI than with Thunderbolt, so if you have the opportunity to use the latter connector, it may be worth a try. Otherwise, you can try changing the resolution in System Preferences and see if this helps.

Image courtesy of Twitter user FatihVidyograf

Apple is aware of the problem, so hopefully it will be fixed in version 11.3 of macOS Big Sur, which is currently in beta testing. Here’s how to update macOS.

This isn’t the first problem to afflict the new Mac minis. Back in November we reported on an issue with Bluetooth.

Catch the best offers on the new machines with our guide to the best M1 Mac deals.

This article originally appeared on Macworld Sweden. Translation by David Price.