MacOS: Difference between revisions
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XNU (acronym for "X is Not Unix") is a [[Hybrid Kernel]] based on [ |
XNU (acronym for "X is Not Unix") is a [[Hybrid Kernel|hybrid kernel]] based on [[wikipedia:Mach (kernel)|Mach]] and [[wikipedia:Berkeley_Software_Distribution|BSD]] which is used in OS X. It was developed to replace the obsolete classic Mac OS (Mac OS 9 and older) kernel, which had poor memory protection and cooperative multitasking. |
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Mac OS X (or just "OS X") is an Apple's half-proprietary operating system for Macintosh computers, which is, in fact, able to be run on any modern x86-64 computer; it also has a mobile version, iOS. |
Mac OS X (or just "OS X") is an Apple's half-proprietary operating system for Macintosh computers, which is, in fact, able to be run on any modern x86-64 computer; it also has a mobile version, iOS. |
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Darwin is |
Darwin is a distribution of core open source components of OS X and iOS. |
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== Features == |
== Features == |
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But it is wrong to classify XNU as a BSD flavor like FreeBSD. XNU and OS X introduce a lot of specific features, including: |
But it is wrong to classify XNU as a BSD flavor like FreeBSD. XNU and OS X introduce a lot of specific features, including: |
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* own sandboxing system; |
* own sandboxing system; |
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* own file system hierarchy (with [ |
* own file system hierarchy (with [[wikipedia:Filesystem_Hierarchy_Standard|FHS]] preserved); |
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* Apple Events and FSEvents; |
* Apple Events and FSEvents; |
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* OpenDirectory, an authentification system; |
* OpenDirectory, an authentification system; |
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