The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
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The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
I'm running Mojave 10.14.6 and wish to Upgrade to Big Sur. After selecting "Software Update" it starts to download Big Sur (12.2 GB). Upon completion the following error message appears: appears: "The update couldn't be verified". I hoped at least to find the downloaded file which is /Applications/Install/macOS_Big_Sur.app but it's not there.
Can anybody help me to solve this problem?
Mac mini 2018 or later
Your download was corrupted. All you can do is try again.
Backup your data before installing.
Make sure all your software is compatible with Big Sur.
https://discussions.apple.com/docs/DOC-250003076
goes into more detail.
One thing to keep in mind. If you are trying to download over a public WiFi, it has a greater chance of getting corrupted.
@a brody: Many thanks for the hints!
I'm going over Ethernet and I don't think to have any corruptions.
Secondly, I understand the compatibility requirements, but I'm not at that point. The issue is just the download of Big Sur.
I tried it three times.
Are there any other methods to download Big Sur?
After downloading Big Sur this appears: "The update couldn't be verified"
