This copy of the Install macOS Monterey application is damaged, and can‘t be used to install macOS.

Question

This copy of the Install macOS Monterey application is damaged, and can‘t be used to install macOS.

I currently run a Mac Book Pro 15` from late 2016 with BigSur and every time I try to upgrade it to Monterey it gives me the following message: This copy of the Install macOS Monterey application is damaged, and can‘t be used to install macOS. I've got no antivirus, switched off the firewall and no malware. What gives? I've also redownloaded the file many times with the same results.

MacBook Pro 15″, macOS 11.7

Posted on Nov 14, 2024 4:36 AM

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Answer 1

Top-ranking reply

dialabrain

Level 10

125,399 points

Nov 14, 2024 10:07 AM in response to gc12gladiator

FWIW, all but one of my Macs, and my iPhones and iPads have always been updated/upgraded on Wi-Fi. It's never been an issue for me for as many years as I can remember. I know some people think it is. I suppose if one has horrible Wi-Fi service it might be an issue.

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Answer 2

dialabrain

Level 10

125,399 points

Nov 14, 2024 5:51 AM in response to gc12gladiator

Try again while in Safe Mode.

Start up your Mac in safe mode - Apple Support

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Answer 3

Ronasara

Level 6

15,043 points

Nov 14, 2024 9:41 AM in response to gc12gladiator

Most likely you are using Wi-Fi to do the downloads. It is too slow for these very large files and corruption is often the result. The solution is to use a wired Ethernet connection for this download. Otherwise you may have to do multiple downloads via Wi-Fi to get a clean one that will install.

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Answer 4

Nov 14, 2024 9:08 PM in response to Ronasara

Well, thank you all but after trying everything including safe mode unsuccessfully, I finally resorted to formatting the disk in recovery mode, reinstalling BigSur from the OS disk partition and finally updating it to Monterey without any problems. Very time consuming especially when all my datas and files had to be downloaded from cloud. Thank goodness for fast broadband! I still have no idea what could have prevented my MacBook from upgrading before…

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Answer 5

dialabrain

Level 10

125,399 points

Nov 15, 2024 12:04 AM in response to gc12gladiator

Glad to hear it's resolved.

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