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HDMI Port No Longer Working After Update to macOS 11 Big Sur

ilpap said:
After installing the latest beta, both screens work on my Mac mini for the first time right away after the restart (no need to mess around with the cables).
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Glad to hear.

I’ve still been holding off updating my Intel Mac mini. Hopefully can update soon once we get more reports of the issue being fixed.
 
Still not working for me. I have a 2018 Mac Mini (actually 2 of them) using 3 monitors. Before Big Sur all 3 monitors worked perfectly. Now nothing from the HDMI port. Very frustrating that there's no traction by now. I'm currently on 11.2 and keep updating when available.
 
have a Mac mini 2018 11.2 upgrade took my HDMI away and the resolution on my AOC monitor went bad
What to do. Wait for 11.3??????
 
I had problems in MacOS 10.x - MacOS 11.1 and 11.2 did nothing for my 2018 mini. Built in HDMI port is randomly failing finding my monitor. Monitor II hooked to a thunderbolt -> HDMI is stable. The only thing that works for me is to reset the SMC and then NEVER turn off the machine, only the screens.
 
r.d said:
I just updated my Mac mini 2018 to Big Sur, and the HDMI port no longer works.



I have a dual 4K monitor setup which has worked fine since I bought the computer.

Monitor 1: HDMI to HDMI

Monitor 2: USB-C/Thunderbolt to DisplayPort

Both monitors are the same brand/model.



Upon first boot into Big Sur after the update, one monitor wasn't working (the one with HDMI).



Troubleshooting I have done:

  • Confirmed the HDMI cable is fine (it works with another computer and the other monitor)
  • Unplugged all peripherals except for the HDMI monitor (result: no output)
  • HDMI monitor not showing up in Display settings


Troubleshooting done with Apple Support:

  • Reset NVRAM & PRAM
  • Reset SMC
  • Diagnostics Test (result: no issues found)


I will be doing a downgrade and Time Machine restore to Catalina in the next couple days to see if the Big Sur update broke the HDMI port, or if it’s a hardware issue.



>> Has anyone had a similar issue? Is there anything else I could try to get the HDMI port working before restoring?
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Here it is Feb 13 and still BigSur is not supporting HDMI second monitor, mine is just for audio...DO NOT UPGRADE TO BIGSUR apple has once again released a non working update. BigSur sucks wayyy to buggy.
 
Big Sur 11.2.1 did NOT fix the HDMI black screen on my Inter Mac mini 2018 - bummer!!
 
I just purchased a new Mac Mini With Apple M1 chip, 16GB memory and 1 TB storage

I could not get my LG 34" LED Ultrawide IPS Computer Monitor - 34UM65-P to work

I had to use a display port to USB-C to get the monitor to work. I did my time machine to load my data to the new Mac Mini then received a message that I needed to update Big Sur and restart the Mac Mini I did this, took a while then when the Mac went to restart NOTHInG. Black monitor. On phone with Apple for hours. Tried everything. Seems my update to Big Sur killed my availability to use my new Mac Mini with my monitor. Funny as my OLD Mac mini, 2012, works with Big Sur upgrade and monitor. It is slow and grinding that is why I updated to the M1.
From what I am reading it seems the upgrade killed it, if anyone has any solutions, let me know. I am trying to now return this New Mac Mini and get a new one again and NOT upgrade it to Big Sur.
 
I'm using Mac Mini M1,
HP 24f monitor on HDMI port -> fine.
Samsung Syncmaster P2350 (rotated 270º) on USB C - VGA adapter, -> working with some caveat, max resolution is only -scaled- 1050x1680. Work around, I set the rotation to standard first, then the max res of 1920x1080 shows, then I rotated again to 270º, and that res stays. but somehow it looks like the monitor is showing something like foggy effect (i'm not sure maybe just my eyes trick me LOL).
 
I have been having the same issue with Macbook Pro Retina late 2013. The symptoms are that when I plug in the HDMI cable the monitor goes out of standby but with no display on - the LED just changes to normal operation indication (blue) instead of sleep (amber), the systems freezes intermittently for the next 5-10 seconds and then when it unfreezes the LED indicator on the screen gets back to amber. There is no indication of a connected screen. My peculiarity was that I had rotated the screen 90 degrees and had it like that for some time prior to the emergence of the problem. I am sure it worked with Big Sur at first, but as some point, which I cannot pinpoint exactly, it just started having this behavior. I have done all of Big Sur the updates and it still is not working. Any ideas will be much appreciated.
 
cyberadius said:
I have been having the same issue with Macbook Pro Retina late 2013. The symptoms are that when I plug in the HDMI cable the monitor goes out of standby but with no display on - the LED just changes to normal operation indication (blue) instead of sleep (amber), the systems freezes intermittently for the next 5-10 seconds and then when it unfreezes the LED indicator on the screen gets back to amber. There is no indication of a connected screen. My peculiarity was that I had rotated the screen 90 degrees and had it like that for some time prior to the emergence of the problem. I am sure it worked with Big Sur at first, but as some point, which I cannot pinpoint exactly, it just started having this behavior. I have done all of Big Sur the updates and it still is not working. Any ideas will be much appreciated.
Click to expand...
Mac mini, 11.2.3 just updated, hdmi quit working, monitors on both usbc ports work.
 
That IS good news. Keep my fingers crossed that they finally addressed the problem in this release. I am going to wait for the formal release of 11.3.
 
Seems to be some sequence that makes the HDMI go off. A reboot then fixes it. I'm trying to determine what the sequence is. Besides that, it has been working very well since my last post on 3/18.
 
Sorry, well, don't count on this working for a Mac mini 2018 to get 3 monitors with HDMI. I downloaded 11.3 beta and with numerous many tries cannot get 3 monitors to work. If you are trying you should backup first so you can reboot your prior system from Time Machine / backup disk as this beta will now be the current version you get from Recovery Mode. I have one monitor in Thunderbolt (Ultrafine Thunderbolt Display) port, and two monitors I have to switch back and forth into a usb-c to HDMI dongle off if the second Thunderbolt bus (you can't place the monitor displays next to each other but alternately in the 4 port series). The HDMI is dead as a third monitor. By killing the Thunderbolt I briefly got the HDMI port to work as a second monitor but then that went away with the Ultrafine plugged back in. Many attempts to reconfigure cables, many restarts, resetting the PMC and NVRAM. Rebbot fixed nothing. If your goal is *two* monitors you can achieve that for the Mac mini 2018. Also I can no longer stream HBOMax in Safari (use Edge). Besides that, how did you like the play, Mrs. Lincoln? Well, actually for me it is a more stable platform. It allows me to use Accessibility > Increase Contrast without pushing the Ultrafine into a binary where contrast is either off or pushed to the maximum. Even seems to improve the quality of streaming and AppleTV video and audio replay (though that's subjective). One Catalina update even forced AppleTV audio to play out of my TV speakers even if the sound was set to play from other output source. So though I'd like 3 monitors at one time I'm not going to go back to Catalina.
 
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