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whilst on firefox in DISPLAYS menu clicked on size 832x624 (experimentally) the screen went black with "input not supported" wordings on monitor. switched off the mac ,and then on again about 3 times but it doesn't change

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  • آخر ردّ كتبه John99

hassanabbasi14
hassanabbasi14
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Mac was functioning properly with the exception of this ODD INCIDENT that made it defunctioned. I'm certain there's a way to retrieve it by using certain keys on the keyboard BUT I'm not aware of this process.

What I'm having now, despite "switching on and off" drill, is just a black screen with the wordings "INPUT NOT SUPPORTED" on the monitor that remains constant each time I try.

Mac was functioning properly with the exception of this ODD INCIDENT that made it defunctioned. I'm certain there's a way to retrieve it by using certain keys on the keyboard BUT I'm not aware of this process. What I'm having now, despite "switching on and off" drill, is just a black screen with the wordings "INPUT NOT SUPPORTED" on the monitor that remains constant each time I try.

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John99
John99
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I am not even a Mac user, but am guessing your problem is that you have somehow changed the screen resolution to something that is incorrect for your setup.

Presumably there is someway to reset a Mac to use default settings or safe settings, possibly relating to bios use. The first result I get from a search engine is: https://support.mozilla.com/en-US/questions/772297