I have a MacBook Pro running macOS Mojave 10.14.5. I am unable to boot into it even in Safe mode. No significant updates were performed with the last week.
After a restart yesterday, my MacBook would not boot into the login screen. It occurs between the FV login and before the login screen appears. I've done quite a number of things, but when trying to booting into verbose mode, by pressing Command + V, the following message keeps looping:
IOConsoleUsers: time(0) 0->0, lin 0, llk 1, IOConsoleUsers: GIOScreenLockState 3, hs 0, bs 0, now 0, sm 0x0
Another message appears:
WindowServer died pid ### WS count 0
Occurred on an old 2008-2012 MacBook Pro
Tried the following without successful boot:
Booting into Safe Mode (Shift + S), hangs in same 60-80% with flashing Gear Wheel every few seconds.
/var/db/.AppleSetupDone, allows language selection but pinwheels and re-loops to language selection.
Reinstalling macOS 10.14.x over current installation by pressing Command + R.
Boots in target disk mode and is able to boot from Utility Drive or other devices in Target Disk Mode.
mbr_cacheforcing macOS to rebuild cache files for booting.
Disk Utility First Aid and
fsck -fyin Single User Mode.
Contacted Apple Care and walked through most of the same steps as listed above and was informed to take it to a Genius Bar for further troubleshooting.