iMac will not start.
My friends iMac will not start.
This message comes up :
"mac OS could not be installed on your computer.
The path / system / installation / packages / OS install.mpkg appears to be missing or damaged.
Quit the installer to restart your computer & try again."
The OS ( High Sierra ) has been installed for months, so has anybody an idea why this message appears ?
A restart just brings the same message back.
Thanks in advance for any replies.
iMac