Macbook Air M1: No 4K@60Hz possible on my 32" 4K BenQ EW3280U

I am suffering a similar issue with a PHL 278E1. The monitor is recognized as 4K. But the resolution by default for it is HD an not 4K. I can change resolution using adjusted (escaled) instead of by default. But going to 4K the letters and images are proportionally smaller ( not usable). The resolution 4K should mean better shape for letters and images, not smaller size. I had much better image quality in my old and death iMac 27 of 2010 than with the new air and a new 4K monitor.

the interface is a caldigit minidock, thunderbolt 3 - hdmi, indicated as compatible with air M1 in the Apple shop page. No explanation had from Apple technical support. OS X 12.2.3 in an air just bought.

No need of any additional software. The caldigit minidock is working well. The problem is not in the dock, in my opinion. I can adjust resolution from the Air M1 display preferences to 4K 60hz, just connecting the dock. But the letters and images are proportionally smaller (unusable), instead of sharper with the right size (better image) thanks to the higher resolution.

I was on live chat with Apple Support for 90 mins, passed between 2 different advisors who did not have a clue what they were talking about.

You have solved my issue in 2 seconds, something Apple Support couldn't do in 90mins.

Thanks

I wish all Apple support was as good as the woman who solved this for me. She asked around and had that solution in about 5 mins. I read through this thread and none of the options worked for me but this did so I figured I’d post. Glad it helped ya!

So it's the software and not the hardware then.

Might also work for USBC to DP or other cables as well :)

Still does not work with BenQ EW3280U on USBC with Mac mini with 11.2 Beta (on any refresh rate or resolution). But I'm happy for you because this is frustrating

When I click default, the system switches to 4K@30hz. When I adjust scaling, it stays the same resolution and refresh rate :/

yes- it makes no difference

Same issue. Screen saver came on and even after log in the screen saver stays on and can’t get past it. Had to restart.

BigSur 11.2 update did NOT fix any of the issues I've been having connecting my 4K monitor to the MBA M1. Nothing has changed.

Where did you get your USB-C to DisplayPort cable? Apple?

On my Mac Mini m1 it seems to work fine using the HDMI port (4k @ 60hz) not sure if its the same for the laptops if you got a 4k 60hz adapter for it (from USB C).

Yes I’m well aware; just giving more info on things I’ve tried personally with my own setup and to show another example of the original poster not being alone with their issue.

it's also same issue on my m1 macbook air with benq ew2780u (usb-c output\big sur 11.2.1).