I don't know how this works with other resolutions but for 2560 x 1080, if you have displayport and are not super techie (as I am not). Can even do 60Hz vs the reduced amount that was required to get SwitchResX working on High Sierra. Then I tried switching from HDMI to Display Port and now everything works fine on my old MBP without SwitchResX. I reached out to the developer and he helped me troubleshoot but was ultimately told that the video drivers in Catalina had a restriction that was not in the previous OS and there was nothing that could be done, my machine just could no longer support 2560 x 1080. I tried all of the solutions above: uninstall and reinstall as a new user, update using EDID, renaming the relocated items file, etc. When I upgraded to Catalina SwitchResX no longer worked and I received the "Not activated - invalid?" message. I was using SwitchResX to display 2560 x 1080 on High Sierra without issue. ![]() Thought I should share in case anyone has the same issue I did. Close SwitchResX and save when prompted.Īfter following these steps, you should be able to adjust the resolution of your external monitor through the 'Display' window in System Preferences.Adjust the settings to match the appropriate PNG provided in this gist. ![]()
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