“macOS Big Sur” could not be verified.

gerritfval Said:

"'macOS Big Sur' could not be verified.: I have tried twice to update from Catalina 10.15.7 to Big Sur and every time I get this message. Why does the update not work? [...]I have tried to install as per your feedback in safe mode, but it goes back to the fault message.[...]”

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Reinstall it All Anew:

The best way around this is to backup your Mac, erase all the volumes, and then install it anew. Once installed transfer the folders and applications.

Refer to my User Tip: How to Reinstall the macOS Anew - No TBM Prior to Upgrade. The scenario is a bit different, but if you follow it, you will see how to perform what I mentioned above. Hope it helps.

gerritfval Said:

"'macOS Big Sur' could not be verified.: I have tried twice to update from Catalina 10.15.7 to Big Sur and every time I get this message. Why does the update not work?"

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Please Provide a Screenshot of this:

1. Go Here: Take a screenshot on your Mac - Apple Support
2. Scroll to: How to capture a window or menu
3. Proceed form there as necessary

Attach the images using this button (first button-in from far-right)

Ryeryeken Said:

"So dis you just try and tried again?"

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Yes. I've recently reinstalled anew, some time ago.

View The Following:

• My Post: Adobe Flash Player Uninstall Message Pops Up - 11-10-20 - Apple Support
• My User Tip: How to Reinstall the macOS Anew - No TMB Prior to Upgrade - User Tips

murderofcrowes Said:

"HMy macboo pro is absolutely brand new and it still won’t instal BigSur because my mac ‘can’t be ‘verified’. Personally, I could care less if I have BigSur, I just want a computer that works.[...]“

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Perhaps this is a Faulty Device?

Seems you have a bug in your Mac. If this is less than 14 days old, then return it. You have a one-year limited-warranty. So, rather than risk a dead Mac, take this into Apple. 

Have Apple look into this. Start by contacting Apple***, and request that a Genius Bar Appointment be Reserved. You would take this to your Local Apple Store, during which the battery and all other necessities would be looked at.

***Info on Contacting Apple:

• Contact Us - Choose Locations
• USA: 1(800)MY-APPLE

Proceed from there as Necessary

Thank you for the image.

Try Via Safe Mode:

Something may be getting in the way here, upon boot. So, boot the Mac in Safe Mode (by holding down the shift key upon boot. Once in Safe Mode, run the Installer. In Safe Mode, login items do not run after logging in.

My macbook pro is absolutely brand new and it still won't instal BigSur because my mac "can't be verified". Personally, I could care less if I have BigSur, I just want a computer that works. However, in the past if you don't keep upgrading OS as they are available (usually losing beloved software compatibility and earning new bugs each time), then eventually nothing works. So . . . do I really have to install BigSur? If so how can a normal person with a brand new computer get the darn thing on board without having to "oh just simply erase everything . . . yada yada volumes . . reboot . . reinstall . . . " balony. Do macs work with their own operating systems or not?

I am in the same boat. Received my MacBook Air on Friday last week and haven’t been able to use it barely because I’m trying to make sure it’s up to date before I really get in there and sign into everything. This is very frustrating

In the end a lot of my problems were fixed by restarting the macbook then creating a new admin user (needs a new name) and deleting the original one that for some reason had a lot of glitches. Because I hadn't put much on the new computer yet, it was no big deal to just start from scratch again and worth it when everything worked finally. That might not be the issue in your case, but if you haven't done much to the new computer yet it might be worth a shot.

PS - the agent was able to reassure me this was not an indication of a dud macbook that had to be replaced, and I have to say it's been working great ever since that simple fix.

gerritfval Said:

“I have finally after 7 attempts installed macOS Big Sur on my MacBook Air 2017.[....]”

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👍

Thanks for letting us know. Glad you stuck with it!

So dis you just try and tried again?