How can I know which setting TinkerTool is modifying?
Here’s a generic solution to find out what changed after applying a certain setting. I used this to create my .osx file which is full of hidden OS X tweaks.

Open Terminal.app, cd into a temporary directory, and check the difference between defaults read output before and after changing the setting.

cd /tmp
defaults read &gt; a
# change the setting using TinkerTool or however you like
defaults read &gt; b
diff a b # view the difference


If you’d rather use a UI to view the diffs instead of the diff binary, you could download the Kaleidoscope.app trial.



Alternatively, you could do a Spotlight search within the past hour/day/minute for plist files. That will only tell you which file changed, though; you would still have to figure out which setting in the file was tweaked.