Install Big Sur keeps failing

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Level 1

4 points

Install Big Sur keeps failing

I've dowloaded Big Sur with no issue. Installing fails as it keeps getting in a loop where it keeps restarting.

I've the same issue with installing Monterrey.

Actions taken, cleaned disks, reinstalled High Sierra, as that is the version I can fall back on.

So there is enough disk space, drive has been cleaned. Any other suggestions why during installation it keeps rebooting without installing it further?

iMac 27″ 5K, macOS 10.15

Posted on Jul 26, 2021 2:52 AM

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Answer 1

Owl-53

Level 10

101,371 points

Jul 26, 2021 4:53 AM in response to ralf274

Have you thought of Downloading the Big Sur again and stop there. Create a Bootable Installer of Big Sur. Then, reboot using the Option key and choose the newly created Bootable Installer and run the upGrade from there.

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Answer 2

BDAqua

Level 10

250,229 points

Jul 26, 2021 3:10 AM in response to ralf274

Can you install to an External drive for a test?

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Answer 3

Owl-53

Level 10

101,371 points

Jul 26, 2021 8:28 AM in response to ralf274

Welcome and Thank you Too :-))

These ASC Forums are a good place for answers and questions. Do come back if or when additional questions arise. Plenty of Contributors available to help out.

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Install Big Sur keeps failing

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