SwitchResX and System Integrity Protection (SIP) Short explanation - if you are using any version of macOS between macOS 10.11 and macOS 10.15.1, you will need to disable SIP to install any custom resolution, and also to install any SwitchResX extension (including SwitchResX Contextual Menu) - if you are using macOS version 10.15.2 and newer, there's no need to disable SIP any more to install cust