• Why isn't my new custom resolution available after restart ?
    The system makes a lot of tests during the boot. If one test is not satisfied by the new timing, this one is rejected and you won't see the resolution activated.
    There's no way for SwitchResX to find which test has failed, so for SwitchResX if a resolution was entered and saved, it can only say that the timing "may be active"..
    Such tests involve multiplicity tests (see above), or range tests (a resolution should not be bigger than the maximal viewable size as reported by the monitor)...