Fail to start up after installing High Sierra
i finally gave in and upgraded to High Sierra. The installation seemed to go smoothly, I even used the computer after the automatic restart, but after a two day shut down the Mac will not start up again, tried several times but always get this message:
macOS could not be installed on your computer
The path/System/Installation/PackageS/OSinstall.mpkg appears to be missing or damaged.
Quit the installer to restart your computer and try again.
Well, same message all the time
iMac 27” Mid 2011, 16 Ram
can anybody help me in solving this problem?
Thanks
iMac, macOS Sierra (10.12.6)