How to find offending Finder Extension?

Solution 1:

I found the offenders in my case (plural, for several apps were using this plugin), using a ps -axe | grep FinderSyncExt .

Before removing the apps using it from my /Applications folder, I decided to kill each of the processes using a killall -9 FinderSyncExt.

Solution 2:

After shutdown (not reboot) and cleanly booting up, I saw the system log show the name of the extension: odrive (www.Odrive.com).

I found an update for the extension and upgraded. This resolved my flooded system log issue.

Solution 3:

FinderSyncExtension[1420]

I had a similar problem. I found that the number in the sqqare brackets is the process ID number of the offending process.

In your example, ps ax 1420 should identify the process.

In my case, it turned out to be the Box Sync app.