Pink tint on HDMI display on Catalina

I have the same issue, but in my case it's BenQ G2420HD monitor using 1920x1080 resolution.

The same issue was with Mac Mini 2012, but it was gone after reboot.

• I checked that monitor and HDMI cable works just fine with my notebook
• I checked that Mac Mini works just fine with other 4K monitor and other HDMI cable

IMO this issue comes with upgrade to Catalina.

Right after upgrade, starting from logo and progress bar displaying the screen had pink tint.

What I tried to do:

• Removed the BenQ display profile while connected to other monitor. Pink tint was gone from logo and progress bar displaying and login screen was also without pink tint, but since I login pink tint appear again. ***?
• Unplugged and plugged HDMI cable
• Rebooted the system, powered off monitor and Mac Mini for a long period
• Reseted NVRAM
• Tried wake up from sleep mode
• Tried to off monitor after 1/5/10/15 min without activity and wake up

It seems like Apple forgot to add this point into release notes:

You should upgrade your monitor with upgrade to Catalina.

You may google a lot of problems that were met after upgrade to Catalina.

My upgrade to Mojave was not so good as well, I had to reinstall it in Recovery mode.

I never met such issues when Steve Jobs was alive.

Now I'll try to downgrade to Mojave and turn off checking of updates.

I guess if monitor issue will gone in Mojave it will be the best proof of issue in Catalina.

Agree it’s a mystery but let’s address the whys after the problem is fixed. How long is the cable? What are the options when selecting Resolution scaled? Have you tried pulling the plug on the monitor and replugging it?

Your monitor is a decade old and simonszu’s is at least 8 years old. That means both are running HDMI 1.0 which is long obsolete, and probably the root cause.

You could try playing with the frequency and/or a shorter cable. If that won’t fix, don’t expect a Catalina bug fix, not happening. Believe it or not, dropping support for legacy devices is a actually feature these days. You’re best bet is to replace with new. Enjoy...

hcsitas wrote:

Believe it or not, dropping support for legacy devices is a actually feature these days.

Why I still see USB ports on back pane of my Mac Mini 2018 then?

Support of DVI monitors was not dropped, but support of HDMI monitors was dropped, are you serious?

And what about backward compatibility?

For temporary solution I used DVI-HDMI cable like this one:

https://www.amazon.com/AmazonBasics-DVI-to-HDMI-Cable/dp/B014I8UQJY/ref=sr_1_3?crid=1NYTX4L6AGNCF&keywords=dvi+hdmi+cable&qid=1571176020&sprefix=dvi+hdmoi%2Caps%2C242&sr=8-3

USB is not legacy. Support for DVI connectors isn’t available from Apple, only third party. Your HDMI display otoh is legacy, worth $0. Do yourself a favor, get a new one, or find someone who’ll give a more recent one for free (I would if it was uploadable). Or stick with what works now. Catalina has moved on, won’t be fixing. Good luck.

Did you try to install Catalina on empty drive from bootable USB?

I have mini 2014 with Thunderbolt Display + HDMI LG - all works fine. The HDMI cord is Apple's bought in 2012. Never upgrade new OS over old one.

Issue still appears after installing macOS Catalina 10.15 Supplemental Update from 15 Oct 2019 https://support.apple.com/en-us/HT201222

Try a different HDMI cable.

More details on the display please: make/model/resolution/macOS screenshot showing settings.

Something like that...whatever works...