Can't get app to update OS

biscottidana Said:

"Thank you! I will try all of the above."

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A Couple of Things:

Download the installer Here: macOS Monterey on the Mac App Store

Try installing it in Safe Mode, or though use of a new user(for temporary use to install this).

Fixing This Elsewise:

Install the MacOS Anew, then Migrate:

If nothing is of success, then you might want to consider reinstalling the macOS anew. You'd backup your Mac, install the previous macOS, and then migrate items back.

1. Create: a Time Machine Backup using an external Hard Drive
2. Install: from a USB Installer created for macOS 10.12 Monterey
3. Migrate: items from your TMB
4. Download then Install: the applications, getting the programs back from the Developers.

biscottidana Said:

"Thank you for these additional notes. Honestly, I believe I may have picked up a virus about three MacBooks ago, and keep bringing it into my Mac world by doing a Time Machine restore. Oy. I may just hire someone to take a peek at my computer. I have no time to get it all wrong."

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See About Getting this Serviced:

You are welcome. You are not going to get a virus on your Mac. So, no worries there. To get this serviced, perform the following...

Whom to Contact:

A. Contact Apple:

You have a One-Year, Out-of-the-Box, Limited-Warranty. So, if less than a year since the date of purchase, contact Apple Support, and see if you can get this serviced through them.

Apple Support Contact Information:

• Contact Us - Choose Locations
• U.S.A. (800)MY-APPLE
• Proceed from there as Necessary

or...

B. Contacting an AASP: 

Also, take this to an AASP (Apple Authorized Service provider), asking for assistance.

1. Go Here: Find Locations - Apple Authorized Reseller
2. Click: Service & Support
3. Enter: your location information
4. See: if there is an AASP nearby
5. Contact: an AASP that shows up, and find out more about the services that they offer to fix the iPhone

Or...

C. A Retailer:

Contact your local retailer, seeing if they replace these slots. 

biscottidana Said:

"Can't get app to update OS: I cannot get my MacBook Air to update for the life of me. It is stuck at macOS Big Sur 11.1. Goes through the motions nearly everyday and never updates."

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What to Try:

Perhaps there is an issue connecting to Apple's servers? So, try the following...

A. Updating in Safe Mode:

(Hold Down: the shift key upon boot). In Safe Mode, login items do not load at log in, certain System Preferences are set aside, and damages system files (caches) are fixed.

B. Single Out this User:

Try creating another administrator user and installing it through that user.

C. Restart your Router:

Perhaps there is an issue with the router's ISP connection? So, try restarting it.

D. Restart the Mac:

Rosary the Mac, and then try this once more

E. Use a Different Network:

Are you using a public LAN (i.e. school network)? If so, you may be limited to only a certain amount of data use. So, using a private LAN.

Hi,

You weren't mention about you MacBook Pro, though macOS Monterey is required early 2015 or later.

If your MacBook Pro suits it, you can download macOS Monterey installer from Mac App Store.