CCleaner
CCleaner is a utility app from piriform that users install to clear junk files, manage startup items, and perform basic maintenance tasks.
What is CCleaner?
CCleaner is a system utility application published by piriform. On Mac, people typically use it to scan for temporary files, browser data, duplicate files, large files, and other storage-consuming items, and in some versions to review startup or maintenance-related settings. Users may encounter it as a manually installed cleanup tool rather than a built-in part of macOS.
Review app leftovers with diCleaner
Inspect caches, support files, containers, and login items before cleaning.
Safety overview
Status: Mostly safe
CCleaner is a legitimate commercial utility, but cleanup tools can remove browser data, logs, caches, and other app data that some users may still want. The main risk is accidental data loss or disrupted app sign-in/history if scans are run without reviewing results carefully.
Recommendation: Keep it only if you actively use CCleaner and trust its cleanup recommendations. If you do not use it, removing the app is usually reasonable. Before using or removing it, review whether you rely on any saved browser data, app caches, or startup-management features it may affect.
Common paths
/Applications/CCleaner.app
Support paths
~/Library/Application Support/com.piriform.ccleaner
Preference paths
~/Library/Preferences/com.piriform.ccleaner.plist
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