Washed out external monitor on M1 Mac mini on usb c

Anyone seeing a difference on 11.3?

Well. I did try Airplay after the above post. Tried with Apple TV connected to Samsung. Did not work. Back to HDMI @30Hz. :-(

Yes. No change. Now wait for 11.4

Any info about fix in 11.4?

I have an HDMI to USB-C cable - same issue. Hope Apple gets a fix for this.

True. Apple would rather be a TV company. :-))

I have this issue too.

I'm using a mac mini m1 paired with a LG 27UK850-W and if I connect the monitor via USB-C I have washed out colors. It is strange because I have two users in the computer and sometimes the second user gets the colors right, so I imagine this is a software issue rather than hardware issue. It is not related to monitor settings.

It is very annoying because I could have the monitor wired with one cable but instead I must use two cables. Please Apple, fix this issue.

I had this issue with an M1 Mini and an LG 32UL500-W.

I have the M1 Mac Mini and the newest Intel Mac Mini connected to the same displays via a KVM switch. Both go from USB-C to Displayport to the KVM via identical Amazon Basics cables, then from the KVM to the display via a current standard good brand DisplayPort cable.

On the Intel Mini, everything's great, but when I switch the KVM to the M1 Mini, everything is horribly washed out on the new LG display. I have a second display, an Acer ProArt, and everything's beautiful on it through either Mac Mini. But the LG run from the M1 mini was borderline unuseable, especially at night.

I messed with settings on the computer and the display endlessly to no avail, but in the end, the 11.5.1 update made the problem go away, at least for now.

I was able to fix this using the script located here: https://github.com/sudowork/fix_m1_rgb

Instructions:

• Open Terminal.app
• Run the following commands:

curl -o ~/Downloads/fix_m1_rgb.py https://raw.githubusercontent.com/sudowork/fix_m1_rgb/main/fix_m1_rgb.py

rm ~/Library/Preferences/ByHost/com.apple.windowserver.displays.*.plist

python3 ~/Downloads/fix_m1_rgb.py

• Reboot your machine and the issue should be fixed. On my monitors (LGUN83A) I noticed that the disabled "Black Level" setting was now correctly set to "High" on the USB-C, the same as the HDMI monitor.

Not sure if this is the same thing but I have this issue the other way round - that is my MacBook Pro monitor is washed out when hooked up to an external monitor via USB C. I can however remedy this by unlocking True Tone in Sys Prefs for the MacBook display - so I'm not sure this helps as there is no True Tone option for my external monitor...

I'm actually on a laptop. Upon installing OS 12.0.1 there is inadequate contrast throughout the system. I'm 79, and it appears the wunderkinder in Cupertino don't care about visual impairment. The so-called Contrast Adjustment (or similar wording) does essentially NOTHING to solve the problem. On forms in Safari and other applications, for example, the borders around text fields are now invisible, and one must mouse around to find them. In their zeal to be the creators of trendy designs they have IMHO screwed up much of the GUI.