iTunes Junk: Cleans outdated device backups, broken downloads, old iOS software updates, and copies of iOS apps stored locally in iTunes. Mail Attachments: Scans Mail for locally stored downloads and attachments, and then cleans them out with the click of a button. iPhoto Junk: Significantly reduces the size of iPhoto and Photos libraries by cleaning up unneeded copies of previously edited images. System Junk: Removes caches, logs, localizations, and more to improve the performance of your OS. Check out all its tools: Smart Cleanup: Cleans your Mac's system, iTunes, Mail, iPhoto and Photos applications, trash bins, and more. Clean, optimize, and maintain your Mac with CleanMyMac 3.