Big Sur 11.1 External Display Issues!

Today I had an remote call with apple care support.

the guy realized that he with the official apple remote support see my monitor but I can not see nothing.

he was so helpful trying to help me and admited that a lot of problems related with monitors and external devices.

next saturday I have a call to execute a software to trace a lot of logs and errors and send it to apple engenering..

lest’s see

> Upgraded to macOS 11.2 (20D53) today, type-C - DisplayPort with BenQ PD2700U works properly.

Let's see next Monday when I go to work.

No lucky this Monday. I am using HDMI(with switching scales to get it work) back on 60Hz now.

This fixed the problem for me, was I was stuck on 1080p on my 27" 1440p Asus display that didn't have options of changing display port version. With the Display menu app I was able to choose 1440p @ 60Hz.

I have the Apple 27 inch Thunderbolt display and MBP 2020..... issues started happening so I changed the resolution on the monitor and it seems like a temporary fix until they patch the OS. Apple support, why dont you reply to all the concerns on this board and at least say you are working on the problem.

This worked for me! But i can't seem to get it to do it again. I also think it was something to do with having the MacBook pro's lid open. I have had the odd time where it detected properly in the past too, and all times the lid was open and I was on the display pane on settings.

Can anyone else isolate the exact scenario needed here? I can't seem to replicate it again.

Shame on Apple.

I sent a message to German magazine publisher "Mac life" and "Mac & i" (Heise) so that they have it on their screen. Maybe they now recognize it and do an article about that problem. Please share this problem also to other publication to motivate Apple to fix this asap.

I tried out the Display Menu App from the MacOS App Store. I think it worked - but it makes the typo in all HZ (60HZ/30 HZ) blurry. Its maybe a solution but not the best.

This morning the issue happened again, only 2160 x 1040 as highest resolution available for my DELL U3219Q connected over USB-C to my MacBook Pro 2018. This time the hack with calibrating the colour didn't work. Spent 45 minutes of restarting and plugging in and out, logging in with a new user etc and then it randomly started working again. This really sucks! Please release a fix for this Apple! So many people are experiencing these issues.

I think Display port might cause an issue, i switched to HDMI from Display port (i could not switch between 1.4 and 1.2 don't have that option) and i don't have problem anymore.

No need to calibrate or unplug plug stuff like that !

I agree. The Display Port does not work for me at all too. I have Big Sur installed on a M1 MBA and 2015 iMac and same thing - DP does not work on either one. In HDMI mode they work but the resolution is below the 5K ultra wide capacity. Using SwithcResX helps but still not at max resolution. I just don't know why Apple keeps reducing functionality (e.g M1 on one monitor now) and does not communicate clearly when a fix will be issued.

I, and I think many on this group, have tried to work with Apple to no avail. From my experience, Apple support will try to convince you this is not an endemic problem, that it is a specific situation that only you are having and they will get the engineers on it to fix your problem. After over a dozen conversations with Apple support, who all seemed to mean well and wanted to fix my problem, it became apparent they had no ability to do so. IMO, this won't get resolved until an avalanche of people complain about it to Apple.

Just upgraded to 11.2. Resolution seems to be fixed on M1 but still does not like a Ultrawide monitor being connected to a iMac. Getting full resolution on a UW 5k is impossible with the iMac. SwitchResX helps to 4K.

For me this has been very reliable. Very fast monitor detection, no glitches or anomalies. From plugging it in - in december, so now running for over a month stable. I did try USB-C cables, and was running USB-C to DP before with no luck, so its not like it was my first try fixing the issue - nothing else seemed to work. That is why I vouch by it.

Regarding HDR - I do not unfortunately know if and what are hardware specs to transfer HDR over such conversion, it is entirely possible the dongle just doesnt support it, or it could be the OS bug still. I dont need it and am happy for a stable experience I left it at that.

Still s..t job by Apple to break something that wasnt broken, but alas.

This issue started December 14th with the release of 11.1. After 45 days of using bandaids to run my external monitors the OS fix I was hoping for 11.2 arrived on February 1st. I am extremely frustrated this was not addressed. We are talking the latest 2020 16" MacBook here. It's practically brand new! Are you telling me that there is no employee on the Apple campus that is running the latest 16" MacBook with external 4k monitors? Seems every update takes 30-45 days to be released to the public. My productivity has taken a huge hit due to this issue. I can't wait that long.

Yes apple are aware, they contacted me on 26th December 2020 and I spent some time on a call with an apple support representative was got me to send them a diagnostic dump to send to send to the engineering team.

I had hoped we might see a fix for the 11.2 update, but alas no.

Run into this issue with a Macbook, Big Sur and a Viewsonic VP3881. Have tried a USB-C to HDMI, USB-C Hub with an HDMI port, no go. Have updated to 11.2, no go. Could not see on the monitor any DP settings to switch from 1.4 to 1.2 on DP, also don't have a DP adapter anyway. Maybe I will invest in a Satechi adapter that people have mentioned here. I'll check back on this thread to see if this gets solved by somebody, thanks!