CCleaner for Mac has many abilities, but it can't do everything.
7 ways you can use CCleaner for Mac:
Protect your Web browsing privacy
Delete passwords and other temporary Internet files, so that nobody will be able to see which websites you've visited.
Protect your privacy for supported macOS applications
Remove information about your activity when you use certain apps, such as the files and folders you choose to access. This is for macOS or third-party apps that are supported by CCleaner.
Remove traces of deleted files to aid your cybersecurity
Skilled criminals can recover deleted files, whether sensitive data or photos. CCleaner can securely delete traces of files to stop this from becoming a risk. This feature also makes it easier to clean out a hard drive you plan to sell on or dispose of.
Save computer memory and speed up your system startup
Boost your macOS startup procedure by selecting which apps start with macOS. Removing some auto-starting apps can help to optimize your computer’s performance.
Help your Mac run more smoothly
Repair the permissions in macOS 10.10 or older to optimize your Mac's performance.
Uninstall apps and software to save hard drive space
You can uninstall programs directly from the CCleaner app.
Get online advertisers and websites off your back
Things you can't do with CCleaner for Mac:
CCleaner for Mac can't detect or remove malware or spyware