Software update issue
Every time I maximise/ full screen when watching something since I updated my software it splits the screen diagonally and does this dual viewing thing
MacBook Air 11″, macOS 12.3
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Does this issue pertain to the Operating System High Sierra macOS 10.13 ( where this posing is appearing ) ?
Or does it relate to User Profile showing MacBook Air 11″, macOS 12.3 Monterey
Either way - from the provided description ( splits the screen diagonally and does this dual viewing thing " this is not normal
1 - Suggest restarting in Safe Mode. This will perform a Disk Repair, clear cache files and only load Apple Software, extensions and fonts. The boot up will be slow and can take some time - Normal.
2 - Does the issue present in this mode ?
3 - Sometimes a Safe Boot followed by a Normal Boot will just put things right.
4 - If not - there could be something in the main User Account playing up. To further isolate this - Set up users, guests, and groups on Mac. Then log out of the Main User account and log into the dummy account and test again if the issue persists.
5 - If the issue is present in the dummy account - then, this appears to be a System Wide issue on the computer.
6 - If after performing each of the above steps is the order that have been presents and still have issues - please advise for possible further assistance.