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i mac is a line of computer operating systems developed, markedted, and sold by Apple Inc, the lateste of which is pre loaded on all currently shipping Macintosh computers. Mac OS X is the successor to the original Mac OS, which had been Apple's primary operating system since 1984
Unlike its predecessors, Mac OS X is a UNIX-based operating system built on technology that had been developed at NeXT through the second half of the 1980s until Apple purchased the company in early 1997.

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