#SwitchResX Settings for LG 21:9 UltraWide
SwitchResX is a utility that allows users to override the default resolution settings in OSX. For more information, including download links, vist http://www.madrau.com/ .
##Disabling System Integrity Protection (SIP)
If you are running OSX 10.11 or higher, SIP must be disabled. To disable SIP do the following:
- Boot into the recovery partition by pressing CMD + R when starting up your Mac.
- Once in recovery mode, open a terminal window.
- Type the command csrutil disable
- Reboot
##Adding Custom Settings
- After launching SwitchResX, select the external monitor from the list on the left.
- Select the 'Custom Resolutions' tab.
- Add a new custom resolution be clicking the + symbol at the bottom of the window.
- Adjust the settings to match the appropriate PNG provided in this gist.
- Press 'Ok'
- Close SwitchResX and save when prompted.
- Restart your Mac.
After following these steps, you should be able to adjust the resolution of your external monitor through the 'Display' window in System Preferences.
Thought I should share in case anyone has the same issue I did..
I was using SwitchResX to display 2560 x 1080 on High Sierra without issue. When I upgraded to Catalina SwitchResX no longer worked and I received the "Not activated - invalid?" message. I also got the relocated items folder.
I tried all of the solutions above: uninstall and reinstall as a new user, update using EDID, renaming the relocated items file, etc.
Nothing worked. 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.
Then I tried switching from HDMI to Display Port and now everything works fine on my old MBP without SwitchResX. Can even do 60Hz vs the reduced amount that was required to get SwitchResX working on High Sierra.
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). maybe just try the different cable... you might save yourself a headache