CCleaner returned nearly 4,000 junk files when I ran the program, which the program removed after I clicked 'Delete.' It was super-simple. Clicking 'Analyze' causes the app to scan your Mac's hard drive and return a report detailing the number of files found and their sizes. The meat of CCleaner is 'Cleaner,' which lets you scrub the system and get rid of junk files. These options aren't well defined the function descriptions use obtuse language which may cause confusion among casual users. You do this by highlighting an app icon and clicking 'Uninstall.' You can also Repair Permissions (when access rights are damaged) and Erase Freespace (which writes data over unused space, preventing prying eyes from digging up deleted files with data recovery software). 'Tools' is the method by which you Uninstall programs. Eliminating the cookies is as simple as clicking the delete button. A site's cookie is listed in the left column ('Cookies To Delete') by default, but should you want to keep them, you can move them to the right column ('Cookies to Keep') by highlighting a cookie and clicking the appropriate directional arrow key. 'Options' is where you tinker with cookies from the various Web sites that you've visited. Tapping any of the icons begins the cleaning experience. Getting Started CCleaner features a simple gray and white interface that displays the version number and your Mac's system specs (OS version, CPU, RAM) across the top, as well as three vertically-aligned icons in the left column: Cleaner, Tools, and Options. CCleaner worked as touted in my tests, improving system performance, reclaiming GB, and helping protect online privacy, but it didn't improve the overall system performance as well as some other apps we've tested.

The free CCleaner aims to clean up your OS X system (version 10.5 and greater) by managing cookies (bits of data used to track your Web browsing activity), repairing permissions, and freeing up hard disk space.

There's no shortage of tuneup utilities are designed for Windows machines-but what about Macs? Apple computers require tightening, too.

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