Just updated my 2013 MacBook Air (normal recurring one, not a major one) I think I’m running higher sierra or the one after that. On restart after after the update get the 3 beeps and nothing I have tried will get me started. Thanks
3 beeps is an indication of RAM failure. If it is indeed RAM then you need to have the computer inspected by an authorized service center. RAM can not be replaced.
If your Mac beeps during startup - Apple Support
3 beeps is an indication of RAM failure. If it is indeed RAM then you need to have the computer inspected by an authorized service center. RAM can not be replaced.
If your Mac beeps during startup - Apple Support
MacBook Air 3 beep after system “upgrade” reset PRAM doesn’t help
