I've found something interesting for settings via PrefPane So, who has an empty prefPane when you installed a fresh copy of modern system 10.12+ and you want to make some settings in it. Like to enable Clicking. By default PrefPane saves it's settings in plist file located at ~/Library/Preferences/com.apple.AppleMultitouchTrackpad.plist and by default sometimes earlier you can enable Clicking via Terminal: defaults write com.apple.AppleMultitouchTrackpad Clicking -bool true but something went wrong (AAPL cheers) and a Key 'Clicking' has a wrong value format. It should be bool but has an integer. So we have to fix this issue integer --> bool Open this file with your editor.app (PlistEdit for ex) and fix this: to this and then reboot or reenter account. Voila! Your prefPane will work properly. EDIT: Also I tried to revert this value format to the wrong one (integer --> 0) and reentered acc. PrefPane worked after all. Setting 'Tap to click' was enabled but no clicking was physically. Then I tried two commands: defaults write com.apple.AppleMultitouchTrackpad Clicking -integer 1 defaults write com.apple.AppleMultitouchTrackpad Clicking -int 1 without success. Then unchecked 'Tap to click' and prefPane automatically fixed in it's plist integer (0) --> bool (false). Checked it once more to enable Clicking and voila: plist file has bool (true) and everything is working fine.