For those who are very familiar of Ccleaner, it's a free utility software that clears all unnecessary junk files to free up hard disk space, especially cache files or temporary internet files. Windows users have it very easy because they have Ccleaner. The purpose is to make our Mac work smoothly and efficiently.

Mac OS X Mac OS X 10.7 was the last release of Mac OS X to support the 32-bit Intel Core Solo and Intel Core Duo CPUs. The earlier version continues to be sold for the benefit of users that require Mac OS X 10.7 in order to upgrade to Lion, which is primarily sold through the Mac App Store introduced in the 10.7 update. Mac OS X 10.7 was succeeded by Mac OS X Lion (version 10.7) on July 20, 2011. This is also the first Mac OS release since System 7.1.1 that does not support the PowerPC architecture, as Apple now intends to focus on its current line of Intel-based products. New programming frameworks, such as OpenCL, were created, allowing software developers to use graphics cards in their applications. Much of the software in Mac OS X was extensively rewritten for this release in order to fully take advantage of modern Macintosh hardware. An addition of new end-user features was not a primary goal. Unlike previous versions of Mac OS X, the goals with Mac OS X 10.7 were improved performance, greater efficiency and the reduction of its overall memory footprint. The release of Mac OS X 10.7 came nearly two years after the introduction of Mac OS X 10.6, the second longest time span between successive Mac OS X releases. As a result of the low price, initial sales of Mac OS X 10.7 were significantly higher than that of its predecessors. On August 28, 2009, it was released worldwide and was made available for purchase from Apple's website and its retail stores at the price of US$29 for a single-user license.

Mac OS X 10.7 was publicly unveiled on June 8, 2009, at the Apple Worldwide Developers Conference. Mac OS X 10.7 is the recent major release of Mac OS X, Apple's desktop and server operating system for Macintosh computers.

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