Problem updating to macOS Big Sur 11.2.3

Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode? Could take 10 minutes.

Safe mode attempts to repair Disks & clears lots of caches & loads safe Drivers, & prevents loading of 3rd party extensions, so if Safe Mode works try again in regular boot.

Well, if Safe Boot scares you...

EtreCheck is a FREE simple little diagnostic tool to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac. It will not display any personal info.

https://www.etrecheck.com/

Pastebin is a good place to paste the whole report if you capture the URL while there…

https://pastebin.com/

Whew, they've changed pastebin & made it harder, but after pasting in, click Create new paste button, then Embed button, then copy the URL...

<script src="https://pastebin.com/embed_js/KuvnghqA"></script>

The important part of the above is...

https://pastebin.com/embed_js/KuvnghqA

Workable but harder for me to work with...the Note tool on the bottom of this editor's toolbar, as shown in the image, to copy and paste the output from EtreCheck. In a Reply before you click post, look for this to add longer texts...

Doesn't work. I've tried several different things and also was on the phone with support for two hours yesterday. The "supervisors" were no longer there because they close 30 minutes before we ended our call. She promised a callback today at 2 PM but never received it. Hope she's ok. But seriously..11.2.3 stalling out after finishing the download. Any other suggestions that DON'T include safe mode? The last time I used a Mac, Oregon Trail just released, it was green and pixelated and the computer took up half the dining room table. So please, don't send me on a wild goose chase that only leads to the portal of Newb ****. LOL

Suggest - restart Router and then Shutdown Computer and connect via Ethernet connection. Restart computer in Safe Mode - Shift - Key immediately at startup. It does a Repair Disk, clears cache files and load only Apple Software - load slowly - Normal. Once in Open Apple Apps Store and find Big Sur and download. Try not to let computer go to sleep mode or Screen Save to activate. Be patient as one knows it Big Sur is 12.18 GB size. There are often periods where it seems to pause the download , normal be patient as countdown clock may say 15 minutes but in Real Time could be 30 - 45 minutes. This can and will happen several time in the process. If all goes well. it will successfully download and attempt to Launch. Do NOT allow it to start - Quit the Installer. Check Applications Folder for new App called Install Bug Sur. Make a copy to External Drive - future usage. Now, restart again in Safe Mode - then launch the Installer.

Suggest - restart Router and then Shutdown Computer and connect via Ethernet connection. Restart computer in Safe Mode - Shift - Key immediately at startup. It does a Repair Disk, clears cache files and load only Apple Software - load slowly - Normal. Once in Open Apple Apps Store and find Big Sur and download. Try not to let computer go to sleep mode or Screen Save to activate. Be patient as one knows it Big Sur is 12.18 GB size. There are often periods where it seems to pause the download , normal be patient as countdown clock may say 15 minutes but in Real Time could be 30 - 45 minutes. This can and will happen several time in the process. If all goes well. it will successfully download and attempt to Launch. Do NOT allow it to start - Quit the Installer. Check Applications Folder for new App called Install Bug Sur. Make a copy to External Drive - future usage. Now, restart again in Safe Mode - then launch the Installer.

I managed to update my MacBook Air after trying all suggestions finally managed it by backing up. Then restarting and holding

command +R until the apple logo appeared it then took about an hour and a half and all mystify was still there too .

Didn't work. :(

This doesn't work and the PC performance is being affected. What are the next steps?

Are you running any VPN, Anti-Virus, or Cleaning apps?

And I'm not sure if I meant to reply directly to you but I meant for it to be for the community lol.sorry

All our M1 based macbook Airs and 13" pros are getting stuck on this update.. Anyone find a solution yet?

Thank you all for the suggestion. I was able to finally able to update my MBA using the "safe" mode.