M1 Mac mini display issue

Installed 11.2 few days in and no more pink squares.

It’s most likely a software issue. 11.3 beta fixed all my hdmi issues. Sign up for a developer account, install the public beta and see if you still have issues!

Apple had a Software Update on Big Sur, and fix my monitor problem.

I have found it only on HDMI. I get snow (like an old analog TV with no station) almost daily. I plug and unplug my hdmi and it fixes.

Have you ever thought about using DisplayPort? Users say the problem is gone.

I replaced my HDMI To Dvi with a DVI to Thunderbolt and I have not had any problems for about two weeks.

With Big Sur 11.4 no ore pink Dot at Boot. The problem seems to be solved :-)

Have you tried reinstalling the OS?

The other issues I had (which were related to graphics) I could reliably trigger like clock work. Those issues resolved with reinstall, and I have not seen any artifacts either.

Granted it could begin having issues again, but those problems I had were from initial boot and I could always trigger it. Never went away.

Also run the update. No luck. I think it's a software issue. When I create an extra (empty) space (see screenshot), and do a reboot, the purple squares are gone on my desktop. I only have the purple spots on the login page. Give it a try.

Hope Apple will come with a real fix soon.

Hi, I just had an interesting talk to one super friendly apple support guy via telephone.

I was calling because I had Bluetooth issues (especially when using wifi) he told me to reset my SMC (power off your Mac mini unplug it - wait for 15 seconds - replug it and wait another 5 seconds then turn it on - this will reset the SMC ) this in fact solved my issues with bluetooth! I also mentioned issues with my Mac mini showing weird artefacts after it went to sleep - his guess was that this could also be an SMC issue... Currently testing and sending my Mac mini to sleep and wake it up again a couple of times - if I don't reply to this, the problem is solved for me and you may want to try it as well.

all the best

The pink squares during booting (start at the login screen, disappear soon after having logged in) are still my only issue. I've been using it for over a week now without seeing them, but that's because I've been putting my Mini into sleep mode instead of shutting it down.

Tonight Apple called me, because they were looking at this thread. Some questions were asked about the issue.

This indicates that Apple is looking into it, fingers crossed they'll figure out what's causing it.

I could quickly make the pink squares appear again after rebooting a couple of times.

Apple asked if the mouse cursor goes over or "behind" the pink squares. I wasn't able to answer that because whenever I tried to move my cursor to one of the pink squares they were blinking and moving.

*update: I tried again and managed to get my cursor on the pink squares now. So if Apple is reading this thread again: the cursor goes over the pink squares, not behind them.

Yeah, there are issues with HP, Dell, and everybody else with drivers, hardware, etc. That's why they include driver/software update utilities on the computers by default when you get them.

The more I think about this the more I think it's just a driver issue. As an example of a driver issue, I installed Linux on an old computer last night and had the same kind of artifacts (these being black and white) on my screen. I updated to a better driver and everything was fine. I get that we shouldn't have this kind of problem out of the gate with these but at least Apple is taking it seriously.

I returned mine, as I noted previously in the thread, but I'll probably get another one in a month or two. I'm not totally throwing Apple out on this one.

Normally I leave my Mini on all the time.

But installed Wacom drivers & I'm still having the pink squares. I've also developed the "static screen" on wake from sleep. Since I read that the "static screen" resolved on unplugging & reinserting in the HDMI cable, I tried it on the pink squares issue. This worked. I know it's not an actual solution, but it does provide some temporary relief until Apple resolves the issue.

Yup exactly the same on the i5 which I sold to get the m1 mini. Makes me highly suspect software and some googling has shown that there were similar issues that were even worse with pink square stuff on other models of macs that were fixed by software updates.