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However, that seems to be easier said than done I'm guessing that the first thing I need is to get startup disk working and create an administrator account. $ bless -mount /Volumes/Macintosh\ HD/ -setBootĬan't load /Volumes/Machintosh HD/usr/standalone/i386/apfs.efiĬould not load apfs.efi data from /Volumes/Machintosh HD/usr/standalone/i386/apfs.efiĪny ideas what I should do? I'm starting to be out of ideas. Tried to set startup volume in recovery mode terminal by running command It just shows question mark folder even if I press the ⌘-S key combination in startup. However, logging into single user mode fails, apparently because there is no startup disk (based on this: ). Tried to start into single user mode (⌘-S), to delete /var/db/.AppleSetupDone file in order to run Mac setup again and get new admin account. I cannot change the setting because the computer has no administrator account. Tried to install macOS from bootable USB memory (created following these instructions ), which fails because external boot is disallowed in Startup Security Utility. Reset NVRAM and SMC, which had no effect. In recovery mode terminal, I've ran following commandsĬan't access "efi-boot-device" NVRAM variable. In addition to internal Apple SSD, there is a macOS Base System Disk Image. Started Mac in recovery mode and ran First Aid on the disk, which says that the volume appears to be OK. No disks are showing, only option is internet recovery, which fails. Started Mac to startup manager (press ⌥ in startup).

The computer shows question mark folder when it's started. The computer's disk has since been erased and all user accounts have been lost. After the update the computer would not start and recovery attempts failed.

Apparently, problems with the computer started initially when update from Catalina to Big Sur failed. I'm trying to reinstall macOS to a seriously messed up MacBook Pro 13" 2018 model. Reinstall macOS to Mac without existing macOS, admin account & startup disk Hi,