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

I talked to Apple support for more than two hours with no solution. All my issues have been forwarded to the tech team. Apparently, Apple is aware of the issues. I was told they will be fixed with the next release of Big Sur. I am not entirely sure if these issues are Big Sur related or M1 chip. Perhaps a combination. At this point, there's nothing to be done other than waiting. Fingers crossed the update will come soon and address the issue.

I am also experiencing something new since my original post. Out of the blue, the screen saver kicks in even though it is disabled and I cannot turn it off. The only way to unstick is to restart the laptop.

Everything is now working A1 for me using a BenQ EW3270U via usb-c with the latest BigSur 11.2 beta..

I just wish Apple had enough courage to admit when there stuff isn't working... 2 more days and I was returning the **** thing...

Crappy communication -> build different Apple ...

Same here. MBP M1 connected to BenQ EW3280u, Big Sur 11.2 latest beta version (as of 22 January) installed on the laptop, and still 4K@30hz max over USB C, or 60hz but 1440p max. Come on Apple, it's a really aweful issue that affects a huge group of users, and renders 4K USB C monitors useless for M1 Mac users.

Same problem for me.

M1 MBA connected to a 4K Asus PB287Q with a USB-C - DP cable that support 4K@60Hz.

I'm stuck at 30Hz for all scaled resolutions that System Preference offers.

I've downloaded SwitchResX Control, and indeed, almost all resolutions offered at 60Hz don't work...

I've used the monitor and cable with another computer at 4K@60Hz, no issues.

Also, I have a 2K Philips monitor at home which works perfectly at 60Hz.

Really weird !

Let's hope that 11.2 will fix this issue

Newest MacBooc Pro, Big Sur 11.2, Benq EW3280U connected by Thunderbolt. ONLY 30Hz!!! Carl! Apple keep silence here. And one more sad thing nobody told. Internal display work on the same 30Hz. On Big Sur 11.1 I saw this digits, and now they hide it from "About My Mac".

APPLE! Have the courage to admit the problem and let us know that you are at least working to fix it!

I have this exact Cable Matters USB C to DisplayPort cable linked by HLN98; I'm using a BenQ EX2780Q and can't get 1440p144hz with my MBA M1. Really frustrating considering my 2013 MBP was able to do 1440p120hz on the monitor no problem (probably a limitation of older hardware) and 2016 MBP was able to do 1440p144hz.

Different model monitor but the problem is pretty much the same of not being able to use maximum resolution. I've tried USB C to USB C, USB C to HDMI, and USB C to DisplayPort... All maxed out at 1440p60hz for me with the M1. Apple please fix lol

Just had a call to Apple support. They know about this problem and working to fix it by some of next version of Mac OS. So all we have now - just wait.

I have 60Hz only on 2560x1440 resolution. But may be it works only cause I use SwitchResX app. I'm not sure.

Wish a patience for all of us.

ˆ..ˆ)))))>>>>>

Well not fixed in 11.3 Beta on my mac mini which seems to have much bigger problems than Mac Book Air which can display in some low refresh rates. In addition Bluetooth on Mac mini is almost unuseable (range is appalling), and the thing reboots every night leaving the screen on constantly after the reboot. First thing I do when I login is send a crash report.

I have the same problem with the TB3->DisplayPort connection of my M1 Mac mini. HDMI works at 4K/60Hz, my Dell 3214Q only gets 4K/30Hz via DisplayPort/TB3. 4K/60 not available with SwitchResX, tried a lot of different cables.

Hi,

I connect my MBP to the Dell display via the dock like this.

MBP --- <USB C cable male-female> --- HyperDrive --- <DP-DP cable> --- S3221QS

And Dell connects fine to MBP when waking up.

When directly connected, the screen goes intermittently black. The same as in your case.

I also tried this same combination with HDMI and the display did not wake up.

(And I got the same weird screen as in your second picture)

So far, DP looks better than HDMI for me.

It's not just the M1s.

I am on a MacBook Pro 2019, using BenQ SW271. USB-C I can get 4k 30 hz, but if I switch to 60hz on the monitor the MacBook doesn't display anything, or it displays a much lower resolution than 4k.

I tried a USB-C to HDMI and then I get nothing (just black) and sometimes flickering on and off on the laptop screen.

After three updates since you posted, similar problems still not fixed by Apple :)))

My monitor is BenQ PD-2720U. I tired thunderbolt 3, td3 -> dp, hdmi with adapter and naive Apple adapter. And only hdmi with naive Apple adapter output with 4K 60hz. The rest of them only output 30hz. However some issues (for example, resizing weirdly, abnormal colour which is similar to someone posted after awakening laptop) when I used hdmi. When I tried to test on my iMac 2019, all worked with 4K 60hz.

I tried to use switchRes etc., doesn’t work.

I read some comments about using dp1.2 instead of dp 1.4, doesn’t work.

I contacted with Apple support. They asked me to reinstall system. Considering possible conflicts from my configuration, I even erased all data. Didn’t work...

M1 compatibility is such a nightmare for me. I can compromise of using single external monitor ( I have to use sidecar on iPad and link iPad to second monitor) but I can’t tolerate 30hz αt all. I have send upon issues to Apple team and hope they can solve ASAP...

So I got my M1 MBP 13" today, obviously I ad issues with display. But my question is I see that M1 chip only supports one display. Since this is a HW limitation I am assuming MBPs with this version of chip will always be like this....Correct? or am I missing something.

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.

Has this issue been resolved? I’ve been struggling with different docs to get 4K @60hz But today I tried the ivanky doc and at first i still got 30hz. Closed the lid on my MacBook Pro M1 and boom 4K @ 60hz.

Here’s the hub i tried: iVANKY https://www.amazon.com/dp/B08PP8HYR9/ref=cm_sw_r_cp_api_glt_fabc_62ZD2XB0556H131M2HYC?_encoding=UTF8&psc=1

Good luck.