I am trying to upgrade my 2015 MacBook Pro from Sierra to High Sierra.
I downloaded the installer from the Mac app store and started it. The first slightly alarming sign was during a reboot about a minute or two in the process when the screen went black and then displayed white horizontal bars in places on the screen (like a display glitch) for a few seconds before then rebooting and continuing.
It then displayed the Apple logo with a progress bar which then displayed “Calculating installation time”. This remained on the screen and nothing else seemed to progress any further. I left the installer to continue running overnight, but when I woke up this morning it was still stuck in the same place, and the progress bar had not moved.
Realising that the installation had probably failed, I rebooted to try again. Now I cannot get beyond entering my password to unlock the storage drive (SSD), some console errors appear briefly on the screen, and then I get a multilingual message on a black screen to wait or press a key to reboot.
What should I do now?
- Try to launch the recovery system (if this has not already been wiped),
- Reinstall the existing OS from there (or from USB stick, failing that),
- Restore my files from Time Machine,
- Try again?
I saw in another post that someone else had problems upgrading, apparently due to having an NTFS driver installed. I have the Paragon NTFS driver installed to allow me to use NTFS external drives. Given that High Sierra has new rules about kernel extensions, which I imagine a file system driver must use, it sounds as though I should perhaps uninstall this before trying to upgrade again?