"SafariBookmarksSyncAgent quit unexpectedly"

Hello Bunky15420,

Thank you for posting in the Apple Support Communities. I understand that you're seeing a consistent prompt on your Mac, and I'd like to help.

For this issue, I recommend taking the steps here:

If Safari is slow, stops responding, quits unexpectedly, or has other issues

If the issue continues, try booting your Mac into safe mode to check for incompatible login items. Here's how:

How to use safe mode on your Mac

I hope this information is useful. Kind regards.

I had the same problem. I went into safe mode and the issue continued. I needed to do something else before continuing so it sat idle for a couple of hours. Later, I rebooted normally and the issue disappeared. I'm grateful but puzzled.

Bunky15420,

Thanks for getting back in touch with us. I'm glad to see that everything is working as expected again.

Have a great rest of your day.