I just copied to the systems folder like this: 'sudo cp DisplayYearManufacture-2015-DisplayWeekManufacture-1 /System/Library/Displays/Contents/Resources/Overrides/DisplayVendorID-1e6d'.Īfter that I renamed the file to match the product ID: 'DisplayProductID-59f1 '. you might save yourself a which cable are you using?
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.