As described in June 2022 by user -- FCPfan2B who wrote:
MacOS seems to have it own version except that it is purple and is
preceded by a short freeze. Then all goes purple for some milliseconds.
Which is followed by a restart. All work a goner and nowhere to send an
invoice for the extra work.
What's happening?
MacBook Air
Trouble Shooting
1 - Restart 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 in the order that have been presents and still have issues - please advise for possible further assistance.
Trouble Shooting
1 - Restart 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 in the order that have been presents and still have issues - please advise for possible further assistance.
Purple screen of death
