Big Sur update is stuck

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Level 1

59 points

Big Sur update is stuck

The update says 8 hours. About 4 or 5 hours into it below the progress bar it says "12.18 GB of 12.18 GB", but the progress bar is still only at about 85 percent and it just seems stuck. Eventually it says the update failed. I try again and it skips to about 9 GB of the 12.18 GB, says it will take between 5 and 8 days to complete, then the progress bar skips to about 85% again and again says "12.18 GB of 12.18 GB" below it.

Any thoughts? It's a brand new Mac and I'm frustrated with Apple updates. I'm on limited bandwidth on satellite internet and two attempts at a 12.18 GB update is very costly. I only get 20 GB a month and that already costs $90!

iMac Line (2012 and Later)

Posted on Nov 20, 2020 4:39 PM

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Answer 1

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Buffsters Author

Level 1

59 points

Nov 29, 2020 7:25 AM in response to Joseph_S.

Thank you for your suggestions, Joseph.

I discovered that the problem was terrible satellite internet service. It was extremely spotty. After two failed attempts to upgrade to Big Sur (and nearly all of my monthly data allowance used up) I packed up my computer and took it to a place where the internet was better and it upgraded in less than 5 hours.

Thanks again. Problem solved.

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Answer 2

Joseph_S.

Community Specialist

Nov 29, 2020 7:15 AM in response to Buffsters

Hey there Buffsters,

Thanks for reaching out to Apple Support Communities. We understand that you're having some issues updating your Mac. We're happy to provide some assistance.

Let's remove any peripherals you have connected to your device, restart your Mac and try again:

Log out, sleep, wake, restart, or shut down your Mac

If the issue persists, try connecting to a different internet connection to attempt the update since you mentioned you have limited bandwidth. If you cannot connect to a different internet connection, you can create a bootable installer of Big Sur using another computer:

How to create a bootable installer for macOS

We hope this helps.

Have a great day!

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Answer 3

PRP_53

Level 10

91,831 points

Nov 29, 2020 7:26 AM in response to Joseph_S.

Note " If you cannot connect to a different internet connection, you can create a bootable installer of Big Sur using another computer" omitted to mention the other computer Must Be Compatible to run Big Sur otherwise that computer will be Denied downloading Big Sur

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Big Sur update is stuck

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