![]() ![]() In future I'll probably just keep the computer on the OS it came with. The greater value for money story that Apple likes to tell customers is not borne out by my experience. ![]() ![]() Really not satisfactory that Apple can't produce newer operating systems that run properly on machines that are 4 years old. I have a bootable Mojave installer, but that consistently leaves the iMac hard drive with overallocation errors that, in the six months I've been trying to fix this, have led to hard disk corruption problems in the end. OR: before installing, create a macOS High. Run the Install macOS High Sierra installer found in the /Applications folder when finished downloading to install macOS 10.13 public beta directly from the installer. So now I'm on to your last suggestion, Internet Recovery and attempting to put Sierra on it. Go to the Mac App Store (found in the /Applications/ folder or the Apple menu) and download the macOS High Sierra Public Beta. Both attempts resulted in the pictured error message towards the end of the process. I tried downloading the High Sierra installer from my iMac with the turgid Big Sur installation. In any case I'm puzzled why they wouldn't permit the downloading of an older OS and then run a script that blocks you from installing it on a new machine if you tried to do that by mistake. Thats a lot of years and a lot of features. macOS High Sierra is the thirteenth version of Apples laptop and desktop operating system since the company acquired its foundations from NeXT. If Apple OS installer files were still disk images instead of apps that run scripts, this wouldn't be an issue. How to download and install macOS High Sierra on your Mac. It's also bizarre that you can't use a newer Mac to help fix an older one. it should now say Get or Download not Open. Restart your mac go back to the App Store High Sierra download page. Connect your mac to your router via cable. Locate it, move it to the Trash, empty the Trash. Would have been helpful if Apple's error message said that instead of 'not available'. then this is Apples way of telling you that there is already a copy of Install macOS High Sierra.app in your. Thanks for that pointer about not being able to download an older version. ![]()
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