If you can’t enter for any reason (typically the password) the Safe Mode, you can also try run the Avast Uninstall Utility in the Normal Mode.To do so, just follow these steps. How to Remove Avast Antivirus Using the Uninstall Utility in Normal Mode. App Cleaner is a free utility, that allows you to uninstall applications on a Mac completely and safely.With this Avast uninstaller, you can remove the software with just several clicks: Launch App Cleaner & Uninstaller. Way 2 – Use Avast Removal Tool App Cleaner.