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ardamgg Author

Level 1

4 points

I stuck on 'Check Null' loading, can't get progress to upgrade to Monterey

MacBook Pro 13″, macOS 10.15

Posted on Dec 8, 2021 11:29 AM

Top-ranking reply

lllaass

Level 10

210,459 points

Posted on Dec 8, 2021 12:34 PM

Is you MacBook Pro an Early 2015 and later one?

Do you have an Apple SSD installed? You need an Apple disk installed to upgrade to Monterey since the upgrade includes an update to the Mac's firmware. That update looks for an Apple disk and write to the dick to do the firmware update. The install will terminate or freeze if no Apple disk.

If not then boot to Recovery and repair/First Aid the startup disk. You can't repair/First Aid the disk you booted from.

About macOS Recovery on Intel-based Mac computers - Apple Support

If disk OK then delete the existing Monterey installer and boot to Safe Mode, which takes minutes and redownload the installer and try again.

How to use safe mode on your Mac - Apple Support

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I stuck on 'Check Null' loading, can't get progress to upgrade to Monterey

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