'About this Mac' in my Macbook missing info

If it shows OK in Safe Mode the repairs made during boot into Safe Mode may fix it so reboot normally and test.

Have you installed or run any "cleaning", "optimizing", "speed-up" or anti-virus apps on your Mac either before or after upgrading to Big Sur?

Did you try the Safe Mode?

bett3r wrote:

I did a Safeboot but the info on 'About this Mac' still now showing (in safe mode).

What should I do now?

Nothing changes from my post above....

If this is an issue you can file a bug report through this same link—

submit your Apple Feedback http://www.apple.com/feedback

You can reboot a try again

If you hold the Option key and click open the  >(Option) System Information

you can see your system info

You can do a Safeboot to clear system cache files and reboot as normal to test

 https://support.apple.com/en-us/HT201262

You can re-install the macOS on top of your existing macOS to sort anomalies

How to reinstall macOS from macOS Recovery - https://support.apple.com/en-us/HT204904

bett3r wrote:

I have a Macbook Pro 13“ and just upgraded from Mojave to Big Sur but the info of my Macbook in 'about this mac' is missing. Usually there's model, display size and year built, but now it's just showing 'Macbook'.

I never change anything in the system and when I was using Mojave, the information was available to view. Is this because the new OSX?

If this is an issue you can file a bug report through this same link—

submit your Apple Feedback http://www.apple.com/feedback

You can reboot a try again

If you hold the Option key and click open the  >(Option) System Information

you can see your system info

You can do a Safeboot to clear system cache files and reboot as normal to test

 https://support.apple.com/en-us/HT201262

You can re-install the macOS on top of your existing macOS to sort anomalies

How to reinstall macOS from macOS Recovery - https://support.apple.com/en-us/HT204904

bett3r wrote:

Feedback sent. So this is confirmed a known issue with Big Sur? I have an iMac 2019 and it showing info just fine.

No.

If it was a confirmed issue, there would be no reason to file a bug report.

Yours is the first and only report I have seen.

You can try the suggestions above... report back your success or failure.

bett3r wrote:

No, I haven't. If then it did shows in Safe Mode, what should I do to make it appear in normal mode?

?

You can do a Safeboot to clear system cache files and reboot as normal to test

 https://support.apple.com/en-us/HT201262