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User profile for user: bvsaker
bvsaker Author
User level: Level 1
4 points

Upgrade from High Sierra to Big Sur fails to install

I have a 2017 Mac Book Pro running High Sierra with over 100GB of storage space available. I'm trying to upgrade to Big Sur.

  1. I go into the App Store and select "macOS Big Sur" (12GB) and click on download.
  2. It says downloading and then calculating and appears to finish after about 30 seconds and then presents an open button.
  3. I click on the "open" button and the window just flashes but does not do anything.
  4. I've done several reboots but nothing seems to change the behavior. There are not errors or warnings anywhere that I can see.


What am I doing wrong? Thanks in advance.

MacBook Pro 15″, macOS 10.13

Posted on Sep 27, 2021 1:24 PM

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User profile for user: HWTech
HWTech
User level: Level 9
60,170 points

Posted on Sep 27, 2021 6:02 PM

Try booting into Safe Mode in case you have some third party software installed that is interfering with the normal operation of macOS.


If this does not work, then delete the "Install macOS Big Sur" installer app from the "Applications" folder and empty the Trash. Then try downloading the Big Sur installer again.


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User profile for user: HWTech
HWTech
User level: Level 9
60,170 points

Sep 27, 2021 6:02 PM in response to bvsaker

Try booting into Safe Mode in case you have some third party software installed that is interfering with the normal operation of macOS.


If this does not work, then delete the "Install macOS Big Sur" installer app from the "Applications" folder and empty the Trash. Then try downloading the Big Sur installer again.


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Upgrade from High Sierra to Big Sur fails to install

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