update stuck at Less than a minute remaining

Hello 7fr2_eL,

This info should help you out:

"If your Mac is stuck on this screen

If you think you've waited long enough to know that your Mac is stuck on this screen, follow these steps.

1. Press and hold the power button on your Mac for up to 10 seconds, until your Mac turns off. Then turn your Mac back on.
2. If the issue persists, press and hold the power button until your Mac turns off. Then unplug all accessories from your Mac, including printers, drives, USB hubs, and other nonessential devices. You could have an issue with one or more of those devices or their cables. Then turn your Mac back on.
3. If the issue persists, once again press and hold the power button until your Mac turns off. Then use Disk Utility to repair your startup disk.

• If Disk Utility found no errors, reinstall macOS.
• If Disk Utility found errors and repaired them, restart your Mac. If the issue returns after restarting, reinstall macOS.

4.If you still need help, please contact Apple Support."

We've found it in If your Mac starts up to an Apple logo or progress bar. It does address this specific issue with the progress bar, and these steps should help to resolve your issue to get the macOS update completed.

We hope this helps out!

Kind regards.