What caused this?

[Trusteft]

Mac Mini, Late 2012.
I remember appearing a couple of times even before Catalina.

 

[chscag]

It appears to be some kind of graphics error. The Mini is not known to develop graphics problems like older MacBook Pros and some iMacs. I would guess it could be the cable you're using to attach your monitor to the Mini. Change out the cable to check.

 

[Trusteft]

It appears to be some kind of graphics error. The Mini is not known to develop graphics problems like older MacBook Pros and some iMacs. I would guess it could be the cable you're using to attach your monitor to the Mini. Change out the cable to check.

Thank you, I will see what I can do. It was with the DP cable.

 

[MBAir2010]

IF you have a macbook, you could network and share screen
were you use the macbook as a screen from the mini
this way you can detect and see what the mini displays.
if you get my drift.

 

[Trusteft]

IF you have a macbook, you could network and share screen
were you use the macbook as a screen from the mini
this way you can detect and see what the mini displays.
if you get my drift.

This is the only Apple computer I own.

 

[MBAir2010]

This is the only Apple computer I own.

ah, hopefully it's the chord, i cant see the mini not showing a half-good screen.

 

[Trusteft]

ah, hopefully it's the chord, i cant see the mini not showing a half-good screen.

The distortion/noise/whatever it is, doesn't stay there. It leaves after a while. Also, it doesn't always appear.