Mac Tuneup 7.0 [Download] Clearing Caches: Applications store information on your use in a temporary cache file that allows you to run the software faster. Over time, caches may become corrupt causing applications to crash frequently. Purging IM Apps: To keep your messaging private or to recover space on your computer, you can clean up the chat history. Completely Removing Apps: Uninstalling an application on your Mac is usually not as easy as just dragging it to the Trash. Other files related to the deleted application can be stored in other locations. Finding Duplicates: As hard drives get larger and backup storage becomes more commonplace, it is easy to lose track of files, folders and archives. Removing Unnecessary Language Files: Your Mac includes a large number of language files from other countries in order to work right out-of-the-box. For most people, these language files are unnecessary and take up space.