Monterey Time Machine not working

Has anyone had any luck with switching cables for an extra HDD? (for example, a direct USB-C to Micro-B cable) I am wondering if bypassing the (Apple-branded) USB-C adapter would make a difference.

No. It just stops working. Just copy your files over. It’s a lot easier than messing amount.

I am afraid that doesn't work for me.

Tried all that. Still doesn’t work.

Well, then perhaps the Library folder is not the solution after all.

Scratch this duplicate

I've had trouble with Google Backup and Sync in the past. The problem at the time was that it was preventing me from uploading photographs from my camera using its provided 3'rd party software. My solution to syncing with Google Drive was to create a small Automator app (see below) launched by a Calendar event at midnight each day. Admittedly, I don't use Google Drive in this way for Cloud storage.

- Pie Lover

Same Problem for me, Since upgrading to Monterey I cant access my older backups, as it keeps asking for the encryption password, which I know 100% is correct and it rejects. So I deleted my old backup and decided to make a fresh backup, but it wont work, and if I tried without encryption. It starts and wont complete, also it doesn't run when the computer is in sleep mode with the lid closed, (plugged in).. It all worked flawlessly before upgrading, come on Apple sort this out asap......

jinet - I switched from (A) a USB 3.0 Type A (at adapter end) to USB 3.0 Type B (at external drive Time Machine end) cable attached through Apple's adapter to the iMac USB C/Thunderbolt port to (B) a USB Type C (at iMac end) to USB 3.0 Type B (at Time Machine end) cable. I saw no improvement in operation. That is, my Time Machine still disconnected and disappeared from the desktop. After finally getting my external drive to wake up by my being persistent in restarting my iMac a few times in Safe Mode and then repairing the external drive from Recovery mode, I was able to get Time Machine to operate normally all of today -- so far -- using the one-piece cable. Since my problem might be due to a failing external drive, I can't say that my experience will apply to your situation. However, I do not think the Apple cable adapter is the cause of your problem. If you have another cable on hand, you might using it with the adapter to see if that helps. Good luck.

There are so many different use cases, it's hard to know what's going on, but I'm going to share what worked for me. My use case: New MBP 14" with the M1pro chip running Monterey. Previous machine was MBP 2016 13" running Big Sur. To set up my new machine, I used Migration Assistant and moved over my User Account, Applications, System & Network, and Other. Time Machine failed to work, in the way others described. Took forever to "complete first backup" and always said Last and Most Recent backups were "none."

I eventually reached a senior support guy who was great. We found that the files had actually been put on the backup drive, but they were invisible, not readable in any way. If you opened the drive, it said empty, but in Disk Utility, clearly the space was used correctly. He escalated the problem to Apple Engineers and while I waited for response, I decided to do the "nuclear" action. I had already re-installed Monterey to no avail. But the one thing I hadn't done was completely erase the internal SSD. I used the Monterey "erase all content and settings" menu option (in the System Preferences menu) and completely wiped my internal SSD. (I had backups via SuperDuper.) Then--and this I think was what did it--when it came time to do a migration, I used Migration Assistant but ONLY for my user account, applications, and System & Network. I did NOT migrate the section "Other Files and Folders"

After this, Time Machine has worked without any problems. It's been working for three days without a hitch.

I spoke back with Apple support and he didn't know if it was the wiping per se, or the fact that "other files and folders" was left off, but suspected the latter and said he'd report it to the engineers. He DID say Apple is aware there have been a lot of issues with Time Machine since Monterey and M1/M1pro/M1max and they are trying to sort it out.

Hope this is of some use to others, although the problems are so diverse it may not.

I also did a clean install and enabled Time Machine after the basic install. Time Machine began working again but by the time I had reinstalled all my applications and documents Time Machine stopped working. Somewhere in the process I was unable to download previously installed applications from the App Store. The only way I could get that working was to download MacOS Montery form the app store and reinstall over my existing files. I got the App Store working but it seemed like the Time Machine stopped working after that. In the last year or so I have had issues with iCloud and I wonder if there might be a problem there causing the Time Machine problem. I am glad that Apple is working on a solution. Mostly I keep everything on iCloud drive and just reinstall from there but it was nice to know that the Time Machine backup was available in case of a catastrophe.