App Fixer
App Fixer is a macOS utility for resetting misbehaving apps by removing their saved state and preference files.
What is App Fixer?
App Fixer is a macOS utility that helps users restore an app to a clean default state when it starts crashing, opens with broken settings, or repeatedly resumes an unwanted window state. It is published by Philip Stokes under the Sqwarq name and is designed for troubleshooting individual apps without reinstalling them first. A common use is resetting preference files and saved application state for a specific Mac app so it can launch as if it were freshly configured. It is especially useful when a program has developed corrupt settings, persistent glitches, or browser-related state problems that are easier to fix by clearing local app data. The app is aimed at everyday Mac users who want a quicker repair step before moving on to a full reinstall or deeper system troubleshooting.
Key features
- Reset an app's preference files to restore default behavior
- Clear saved application state for a selected Mac app
- Help troubleshoot crashes, launch problems, and persistent bad settings
- Restore Safari to a cleaner starting state during browser recovery
- Reduce the need to manually hunt through Library folders for app data
Review app leftovers with diCleaner
Inspect caches, support files, containers, and login items before cleaning.
Safety overview
Status: Mostly safe
App Fixer is a legitimate Mac troubleshooting utility, but its main action is to remove an app's local settings and saved state so that app starts fresh. That is normal for its purpose, yet it can reset preferences, reopen behavior, and similar customizations for any app you choose. Use it when you want to repair a misbehaving app and make sure you are comfortable losing that app's current settings before you proceed.
Recommendation: Keep App Fixer if you use it to troubleshoot Mac apps or want a quick way to reset corrupted preferences without reinstalling software. If you do not use maintenance tools like this, you can remove it without affecting macOS itself, though you would lose its one-click repair convenience.
Common paths
/Applications/App Fixer.app
Share your experience
Be the first to share your experience.