iCloud bookmarks won't sync!

Hi,

I created an Apple Support ticket for this almost a year ago and have gotten zero movement or updates other than "the engineers are working on it" since last November. So, I though I would post something here to see if anyone else is having the same problem. My iCloud bookmarks aren't syncing at all between my Mac (13" MacBook Pro running 10.15.6) and iPhone (11 Pro Max running 14.0.) I've gone through all the steps on this support page without any success: https://support.apple.com/en-us/HT203519 . Note that iCloud Tabs and History sync just fine!

Out of desperation, I fired up the Console app to see if there are any clues in the log messages. I even did a comparison between my wife's working setup (same hardware) and mine. The difference is that I see the following errors in the logs:

Note that these two log message blocks appear both in the Mac logs as well as the iPhone logs.

This set of 4 error shows up regularly:

Those errors don't appear in the Console on my wife's computer.

And this is the sequence of log messages that shows up when SafariBookmarksSyncAgent attempts to sync the bookmarks:

One thing that stands out to me is "Discontinuing sync since local migration has not yet completed". That shows up every time a sync is attempted. This sequence finished with result 0 (success, I assume) on my wife's computer.

I've tried every combination of deleting bookmarks, turning off Safari iCloud syncing, restoring the default bookmarks, restarting, waiting, etc. that I can think of and I've run out of ideas. There's no way I'm the only person having this issue and there has to be some other way of escalating it. Should I e-mail Tim Cook?? I'm half joking. The AppleCare specialist route has clearly failed.

Anyway, maybe someone out there has some info to add or leads to follow.

Best regards,

Ash