iMac 27 Late 2009 with ssd, worked well before i update El Capitan to High Sierra. When instal update from AppStore or just restart machine i got only A circle with a line or slash through it.
So i tried to downgrade and i made bootable USB El Capitan.
First i formated ssd with Bootmanager and started to instal El Capitan, and it took long time and stopped at 1 second left. Then it said installation file might be changed and cannot instal.
I shut it down and made another copy of El Capitan Bootable usb, but after that at startup i get only white screen with folder and question mark. Pressing option at startup dont do nothing. So i cannot open the bootmanager.
Any idea how to fix that and get osx install?
-Thanks for in advance.
[automerge]1581549835[/automerge]
To answer my self, i made one more copy of bootable usb with Disk creator and now i manage to open bootmanager and everything is working.
So i tried to downgrade and i made bootable USB El Capitan.
First i formated ssd with Bootmanager and started to instal El Capitan, and it took long time and stopped at 1 second left. Then it said installation file might be changed and cannot instal.
I shut it down and made another copy of El Capitan Bootable usb, but after that at startup i get only white screen with folder and question mark. Pressing option at startup dont do nothing. So i cannot open the bootmanager.
Any idea how to fix that and get osx install?
-Thanks for in advance.
[automerge]1581549835[/automerge]
To answer my self, i made one more copy of bootable usb with Disk creator and now i manage to open bootmanager and everything is working.
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