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Beameranged Author

Level 1

8 points

External Display Issues — Ventura 13.4.1 Update

M1 Mac Mini, about six months old, with two 27" HP external displays running just fine until updating to Ventura 13.4.1.

Either one will still work in isolation via HDMI. But neither will show anything via either USBC port. Have tested with several cables and also switching power supplies.

Sometimes, evidence of the other monitor will constantly flash up in Displays settings, only for a second at a time, with nothing visible on the actual screen. Other times, connecting USBC sends both screens black, which will remain that way until only HDMI is connected again.

Literally nothing changed with configuration except for updating from an earlier version of Ventura (suspect 13.0.1 but uncertain) to 13.4.1.

Have spent a long time on this and am now very frustrated and out of ideas. Could anybody please help with the solution...?

Mac mini, macOS 13.4

Posted on Jun 23, 2023 10:41 AM

External Display Issues — Ventura 13.4.1 Update

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