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Oct 21, 2019 · macOS is a UNIX 03-compliant operating system certified by The Open Group. It has been since 2007, starting with MAC OS X 10.5. The only exception was Mac OS X 10.7 Lion, but compliance was regained with OS X 10.8 Mountain Lion. Amusingly, just as GNU stands for "GNU's Not Unix," XNU stands for "X is Not Unix ."
- Freelance Journalist
Feb 10, 2018 · Unix is a operating system. They are two different things. Strictly speaking, Debian and Gentoo aren't Unix distributions, they're Linux distributions. Linux isn't Unix, it just works like Unix. Nor AFAIK are they GNU distributions: the GNU tools are a part of any Linux distribution, but not the only part.
Yes, it is UNIX. There's no requirement for UNIX operating systems to be open source (indeed many, like IBM's AIX and HP's HP-UX, aren't), they must conform to a specification called the Single UNIX Specification (formerly POSIX). However, it happens that much of Mac OS X is open source, with most of the UNIX layer being part of the Darwin project.
Mac OS X is plain Unix. This is a BSD Unix flavour, and is certified SUS V3 ( Single Unix Specification version 3). This means that everything that a software engineer or system administrator expects to find in a Unix system is present in Mac OS X. This is a BSD system built on top of a MACH microkernel.
- IMHO, this question can be interpreted in two ways. At the literal level, Mac OS X gained UNIX 03 certification with the release of Mac OS X 10.5 (...
- Open a Terminal and it's Unix. Use the GUI, and it's OS X. Many of us consider this the best of both worlds. I never would have switched to Mac if...
- As some of the answers have said, there are two sides to this question. If you mean a license, then OSX is official Unix (TM). On the other hand,...
- I'd say Unix can only be defined by the various Unix flavors out there. Consider the question: what's Unix like? The Answer: Try a Unix system to...
- The GUI is the one that hides the feature. Underneath it feels like a BSD with some cosmetic differences, and some platform differences. When you...
- A significant point is how much you can do only via the GUI, and the answer is surprisingly little -- including modifying GUI settings or running A...
- The difference that stands out the most for me is that the default Mac OS X file system, HFS Plus, is not case sensitive. It is possible to use UFS...
Jun 4, 2018 · Re Linux-like userland: OS X's userland is closer to FreeBSD. Examples: OS X uses BSD find which requires the directory (it doesn't default to . as GNU find does); BSD commands lack --long-options; GNU commands have more options than in BSD; OS X lacks /proc; OS X's primary GUI is almost entirely different from Linux's (X11 is a mere sidecar on OS X); OS X's dynamic linkage system is entirely ...
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Mac OS X succeeded classic Mac OS, the primary Macintosh operating system from 1984 to 2001. Its underlying architecture came from NeXT 's NeXTSTEP, as a result of Apple's acquisition of NeXT, which also brought Steve Jobs back to Apple. The first desktop version, Mac OS X 10.0, was released on March 24, 2001.
The system was originally marketed as simply "version 10" of Mac OS, but it has a history that is largely independent of the classic Mac OS. It is a Unix-based operating system built on NeXTSTEP and other technology developed at NeXT from the late 1980s until early 1997, when Apple purchased the company and its CEO Steve Jobs returned to Apple.
