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User profile for user: Drews_OS
Drews_OS Author
User level: Level 1
29 points

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

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User profile for user: Sk8rGabe22
Sk8rGabe22
User level: Level 1
10 points

Posted on Oct 3, 2023 7:09 PM

Same issue here on MacBook Pro M2 with an external 4k LG monitor. It was working fine in Ventura. It is not recognized in Sonoma via USb-C. It works via HDMI. However I have two external monitors and need to use USBC for one. apple please fix this ASAP!

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

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