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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