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Update OS High Sierra

Apple store show 2 icons in updates but I cannot access them. I need to update High Sierra 10.13.6 and cannot.

How can I update my OS

iMac 21.5″ 4K, macOS 10.13

Posted on Jan 4, 2021 8:59 AM

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Question marked as Top-ranking reply

Posted on Jan 5, 2021 5:55 AM

Maybe try Mojave, Catalina, or Big Sur standalone downloads?


Don't use FireFox for this linhttps://apps.apple.com/us/app/macos-big-sur/id1526878132?ls=1&mt=12


Try the standalone 10.15.6 in Safe Mode, but not using Firefox...


Safe Boot, (holding Shift key down at startup).


Try reinstalling this in Safe Mode, but not using Firefox...

https://apps.apple.com/gb/app/macos-catalina/id1466841314?ls=1&mt=12


Don't use FireFox or WaterFox for this link. it'll mess it up...

https://apps.apple.com/us/app/macos-big-sur/id1526878132?ls=1&mt=12

5 replies
Question marked as Top-ranking reply

Jan 5, 2021 5:55 AM in response to denise121

Maybe try Mojave, Catalina, or Big Sur standalone downloads?


Don't use FireFox for this linhttps://apps.apple.com/us/app/macos-big-sur/id1526878132?ls=1&mt=12


Try the standalone 10.15.6 in Safe Mode, but not using Firefox...


Safe Boot, (holding Shift key down at startup).


Try reinstalling this in Safe Mode, but not using Firefox...

https://apps.apple.com/gb/app/macos-catalina/id1466841314?ls=1&mt=12


Don't use FireFox or WaterFox for this link. it'll mess it up...

https://apps.apple.com/us/app/macos-big-sur/id1526878132?ls=1&mt=12

Jan 5, 2021 5:45 AM in response to Ronasara

Yes you're right it is supposed to be as easy as that. I open About this Mac and select Software Update, it then opens the Apple store. It shows the icons for 2 updates, however I have a blank page, as per image below. I can browse for Big sur which I'm assuming is the update I need. I hit download, it calculates the the time and then just quits with no error message.

Update OS High Sierra

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