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Macs run the macOS operating system, which is the second most widely used desktop OS according to StatCounter. [192] Macs can also run Windows, Linux, or other operating systems through virtualization, emulation, or multi-booting. [193] [194] [195] macOS is the successor of the classic Mac OS, which had nine releases between 1984 and 1999.
Digital rights management in the Apple–Intel architecture is accomplished via the "Dont Steal Mac OS X.kext," sometimes referred to as DSMOS or DSMOSX, a file present in Intel-capable versions of the macOS operating system. [citation needed] Its presence enforces a form of digital rights management, preventing macOS being installed on stock PCs.
Mac OS X Snow Leopard (10.6), released in August 2009, was the first version of Mac OS X (later macOS) to require a Mac with an Intel processor, ending operating system support for PowerPC Macs three years after the transition was complete.
In the mid-1990s, Mac OS was falling behind Windows. [3] In 1993, Microsoft had introduced the next-generation Windows NT, which was a processor-independent, multiprocessing and multi-user operating system. [4] At the time, Mac OS was still a single-user OS, and had gained a reputation for being unstable.
This is a list of Microsoft written and published operating systems. For the codenames that Microsoft gave their operating systems , see Microsoft codenames . For another list of versions of Microsoft Windows, see, List of Microsoft Windows versions .
Timeline showing releases of Windows for personal computers and servers. Microsoft Windows is a computer operating system developed by Microsoft. It was first launched in 1985 as a graphical operating system built on MS-DOS. The initial version was followed by several subsequent releases, and by the early 1990s, the Windows line had split into ...
The utility also installs a Windows Control Panel applet for selecting the default boot operating system. Initially introduced as an unsupported beta for Mac OS X 10.4 Tiger, [1] [2] the utility was first introduced with Mac OS X 10.5 Leopard and has been included in
At macOS's core is a POSIX-compliant operating system built on top of the XNU kernel, [81] (which incorporated large parts of FreeBSD kernel [14]) and FreeBSD userland [14] for the standard Unix facilities available from the command line interface. Apple has released this family of software as a free and open source operating system named Darwin.