Hazel includes a built-in uninstaller that can remove the preference pane as well as all settings and files related to Hazel. Note that uninstallation also removes your license file, so unless you’re removing a demo or evaluation version, be sure you have a copy of the original license file in a safe place.
If you selected “Install for all users of this computer” when installing Hazel, be sure you are logged in to your Mac with an administrator account before proceeding.
To uninstall Hazel:
Go to Hazel’s “Info” pane.
Click “Uninstall,” read the explanation of what will happen, and click “Uninstall” again to confirm.
Hazel closes System Preferences, removes its components, and reopens System Preferences when uninstallation is complete.