Open lukasdk6 opened 4 years ago
I can confirm(Macbook Pro Late 2013 13"). After that, on SwitchResX I configured a custom resolution (CVT-RB) and used 49Hz (instructions here). My Dell Ultrasharp U2718Q supports 60Hz, but I couldn't get there. If you put 60Hz, it will get down to 6 in the list of Custom resolutions.
After having it showing 50Hz (even though I selected 49Hz), I rebooted and now SwitchResX showed 3840 x 2160, 50Hz (PAL)
on the Current Resolutions list. Clicked and it worked.
You can confirm this by going to Apple > About This Mac > System Report... > Graphics/Displays. You can then go to Settings and change you "Scaled" size normally and it'll keep at 50Hz.
I have successfully applied steps* on a MBP mid-2012 13" running Catalina 10.15.3. After last step and rebooting the machine I could set the ultrawide resolution for LG 25UM58 for 2560 x 1080 without using SwitchResX. Thanks for all in this community!
* Steps
sudo mount -uw / sudo chmod +x CoreDisplay-patcher.command ./CoreDisplay-patcher.command patch v5 Wait and reboot.