Frequently Asked Questions

Here's a list of common asked questions. Check regularly for the latest updates. Thanks :-)

• Custom resolutions
• I can't get my wide screen monitor to show its native resolution on my Mac
• How can I get my 5120x1440 monitor working ?
• Can I define custom resolutions bigger than 4096 pixels wide ?
• I want to use a HiDPI resolution that is half the native size of the monitor, but this doesn't work
• How can I define a new HiDPI resolution of ... ?
• Why isn't my new custom resolution available after restart ?
• How can I configure a headless MacMini controlled via Remote Desktop to match the remote resolution ?
• I am trying to modify a built-in resolution, but macOS doesn't accept it
• SwitchResX always says a "Reboot is needed"
• Where can I find the timing parameters for a specific resolution ?
• What is the "Use Keychain" button for ?
• Why does SwitchResX force me to use 1368 as the horizontal value when I enter 1366 ?
• I can't define a setting for VGA when using a Mini-DP to VGA Adapter
• Startup problems
• I've defined a new resolution and rebooted, and the system boots with a black screen.
• I've selected a new defined resolution and the screen went black.
• I've selected a specific orientation setting and the screen went black.
• My ColorSync profile shows the name "SwitchResX" after uninstallation.
• Other issues
• SwitchResX doesn't save my settings
• I keep getting the popup saying I'm not registered, even though I did register
• SwitchResX keeps prompting to update when I already have the latest version installed
• The tool doesn't solve my specific issue - can I get a refund ?
• Compatibility
• Is SwitchResX compatible with macOS Catalina ?
• Is SwitchResX compatible with macOS Mojave ?
• Is SwitchResX compatible with macOS High Sierra ?
• Is SwitchResX compatible with macOS Sierra ?
• Is SwitchResX compatible with El Capitan ?
• Is SwitchResX compatible with Yosemite ?
• Is SwitchResX compatible with Mavericks ?
• Is SwitchResX compatible with Mountain Lion ?
• Is SwitchResX compatible with Lion ?
• Is SwitchResX compatible with Snow Leopard ?
• Which version do I need to use with older MacOS X versions ?
• Uninstallation
• How do I uninstall SwitchResX ?
• After uninstalling, I still get the popup message stating that I need to register
• Disabling a display
• Can SwitchResX disable a display ?
• I use Mavericks (or later versions of MacOS X) and my display doesn't disable completely
• Why is the backlight still lit when the display is disabled ?
• I disabled the internal screen, then I unplugged the external display…
• I've enabled back a display that I previously disabled, and the wallpaper is now grey