How to fix refresh rate Issues on Dell monitors after Sonoma update

I just upgraded to Sonoma and my external 4K Dell monitor is no longer refreshing at 60hz. My 14" M1 Pro will not detect 60hz refresh rate. Before I upgraded the OS everything worked fine. I have an LG UltraFine next to my Dell and it is working fine. I have switched cords, tried a display port, EVERYTHING. The only way it detects 60hz is if I plug it directly into my Mac instead of from my USBC hub. It is the weirdest thing. Does anyone have any idea what the issue could be??

[Re-Titled by Moderator]

MacBook Pro 13″, macOS 12.6

Posted on Sep 26, 2023 9:17 PM

Top-ranking reply

astroboy129

Level 1

13 points

Posted on Dec 18, 2023 3:44 PM

I have just 'downgraded' my OS back to Ventura and everything works normally now. Ngl, I think I spent too much time troubleshooting this issue and even Apple Store Techs are not aware of it. I will soon contact the online support and get a Tier 2 Data Capture and see what actually happened.

To get OS Ventura back, you have to back up everything using Time Machine.

Erase your mac.

Restore your mac to its original OS (Say mine is Macbook 2019, so it will get back to Catalina)

Download Ventura on App Store.

Install it Ventura, restore all your files.

Violà :)

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108 replies

nicu258

Level 1

12 points

Feb 2, 2024 1:00 PM in response to Drews_OS

Also i have a problem every time im trying to connect my external display on a macbook air m1 its sayng extended but my finder bar and dock does not appear

ElKnijn

Level 1

8 points

Feb 5, 2024 1:12 AM in response to bMillz23

Some fiddling with the monitor settings did the trick for me!

ronlap

Level 1

49 points

Oct 24, 2023 3:53 PM in response to brainstewn

I also have not had problems with my Caldigit TB3 hub. My OWC travel hub is a different story and when I tried to open a claim they told me that Apple video glitches on a hub is a well-known problem and that they would not allow the claim.

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How to fix refresh rate Issues on Dell monitors after Sonoma update