#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.
I have t revise the above comment of ours. It worked only until we rebooted the second time and then no more. We don't know why it was displaying correctly after we had changed from HDMI in MacMini to the MDP with adapter UGREEN MDP>HDMI+VGA - It worked the first time only, unfortunately. We then rebooted again and got again the 1920x1080 for the ultrawide LG screen. We write to the SwicthResX Support and will see if they have any idea why it worked only one time - the first time after we started using the MDP>HDMI adapter.