Green screen when booting
MY 2911 Mac suddenly went crazy and now I have a green screen with an apple that is half black and half green stripes. It keep ps rebooting itself with the same green screen?
what can I do to fix this?
iMac 21.5″, 10.13
Sadly that sounds like a hardware issue.
I would try starting up Safe Mode to see if that helps.
see > Start up your Mac in safe mode - Apple Support
If that doesn’t help, then you need to seek help from your local Authorities Apple Service Provider.
see > Official Apple Support