MacFossils scans your Mac for leftover files from uninstalled apps and helps you clean up your system. Over time, macOS accumulates many hidden files such as preferences, caches, launch agents and support data that remain even after an app is removed. These files often stay in your system libraries and can slowly clutter your Mac. MacFossils searches common locations where applications store their data and identifies orphaned files that likely belong to apps that are no longer installed.