How do I permanently disabled SafariBookmarksSyncAgent? it killing my ram

I struggled with the same problem, then reset my permissions following the instruction on this page:

Resolve issues caused by changing the permissions of items in your home folder - Apple Support

Fixed! Hope it works for you.

M

Did you try resetting permissions? Worked for me (see above in the thread), and maestro71 above also reported success.

Here's a link to the procedure to follow:

Resolve issues caused by changing the permissions of items in your home folder - Apple Support

Hi,

Sorry for the delay in answering, I had family down over the weekend.

If the Sync option was off and Safari was also Off I would have expected the Force Quit to have worked.

I would Quit Safari and Force Quit the Agent again and the do a NVRAM reset

How to reset NVRAM on your Mac - Apple Support

8:51 pm Monday; October 30, 2017

Hi,

Have you turned Off Safari Sync in iCloud in System Preferences ?

7:50 pm Friday; October 20, 2017

Not sure if this is true for the original poster, but Safari has never been enabled in the iCloud System Settings on my late 2012 MBP nor in my iPhone and I also see this memory leak in SafariBookmarksSyncAgent. That process re-spawns and starts eating RAM eventually slowing my system to a crawl within 30 minutes. When killing the process either at the command line or in Activity Monitor, it respawns in < 1 minute and memory usage rapidly creeps upward of 20 GB with swap usage off the charts.

I just keep activity monitor running in its own workspace and manually switch to it and force quit the process every time i hear my cooling fan kick in or notice the system starting to run slowly. If I don't shut down the system completely, there's a very good chance it will be frozen if I leave it inactive for more than an hour or so.

This happens whether Safari is running or not (usually not since Chrome is my primary browser). I first noticed it immediately after installing High Sierra about 3 days ago. This definitely did not happen with Sierra.

It is beyond frustrating.

I'm having a similar problem, and have gone through similar efforts to remedy it. I don't use Safari and don't need to sync bookmarks to any other device. A simple method to disable or delete SafariBookmarksSyncAgent would be much appreciated.

Hi,

I can't see anything in Safari but I would try turning Off the Sync in the iCloud settings for the app on both the Mac and the iPhone

8:52 pm Thursday; November 16, 2017

So i tried resetting the NVRAM and although things seem to be runnings a little faster now on my computer at boot up its still having the same issue with the SafariBookmarkSyncAgent creepiing up the memory stack and consuming all available memory resources.

Wow - this did indeed resolve the issue for me. Memory leak has not reappeared almost 24 hours and one reboot since repairing permissions. Thanks!

I find it curious that, after decades of repairing permissions being listed as a possible fix to hundreds of possible issues, this is the first time it actually worked! And it happened after Apple apparently gave up on it and removed it from the Disk Utility GUI 😝

Regardless, I couldn't be more thrilled!

Same problem here and still an issue as of 10.13.2. It is so bad it makes it impossible to make a 40 GB time machine backup take place. 8 hours and counting. I can sit here and keep force quitting but it keeps relaunching and monopolizing system resources. I already disabled sync and I signed out of iCloud. Just awful.

I have still doesnt work

I have had this same blasted problem as well. Cant find any way to stop this process from restarting after i force quit it in the Utilities menu

Well, the problem persists even after installing the 10.13.2 combo updater. Sigh.