iMac boot failure
iMac pro won't not. Shows apple logo and sounds off every few hours.
iMac 27″, macOS 10.13
iMac pro won't not. Shows apple logo and sounds off every few hours.
iMac 27″, macOS 10.13
... and sounds off every few hours.
What type of sound? That might be a useful clue.
iMac boot failure