![]() In the next window, press the 'Show all disks' option. Reinstall macos high sierra license#Click 'Agree' to the accept license agreement. Press 'Continue' in the following screen. Permission denied.ĭetails - iMac "Core i5" 3.3 27-Inch (5K, Late 2015) 3. Step 2: Installing macOS High Sierra on the External Drive After you complete the download of the macOS installer, double click the same from the Applications folder to begin the installation procedure. I am not able to boot into any other modes with this iMac, I also do not have a backup of the Mac (I do of the 2 which is annoying, they're different models) Any help with this will be much appreciated.Įrror - Unable to re-install High Sierra.Įrror message* - The operation couldn't be completed. I know the OS X base system is the wrong place for it to boot from but it's the only option I have, I cannot add or erase any of the partitions on the HDD. I have found one other post by /u/ALiiEN I have tried following the steps other users have posted to no avail. I am now trying to re-image the iMac but getting the error* state below. So, we sent the iMac off to get all the information off it before I'd re-image it. This can be obtained from the Mac App Store using a machine that supports High Sierra, or. ![]() Background - The user let the HDD get to a 100% so the mac was stuck booting into Disk Utility mode, called apple who advised there was no way to get back into the system without wiping the Mac. Things youll need: - A copy of the macOS High Sierra Installer App. ![]()
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