Mac OS: Difference between revisions

'''Mac OSmacOS''' is the [[:Category:Operating Systems|operating system]] used in [[wp:Macintosh|Macintosh]] computers since their introduction in 1984. Some appliances (notably the [[wp:iPhone|iPhone]] and [[wp:iPad|iPad]]) also run derivative versions of Mac OS, named iOS. The current version is '''[[wp:OSmacOS XSierra|MacmacOS OS XSierra]]''' (10.10 (often referred to as simply '''OS X'''12), which is derived from [[wp:NeXTSTEP|NeXTSTEP]], and has a [[wp:Mach (kernel)|Mach]]-based microkernel running a [[BSD]] compatibility layer. Most applications are written in [[:Category:Objective-C|Objective-C]] and [[:Category:Swift|Swift]] using the [[Cocoa]] framework.

Pre-X versions of Mac OS ([[wp:Mac OS 9|Mac OS 9]] and lower) were written in-house at Apple and were based in part on the slightly earlier [[wp:Apple Lisa|Lisa Office System]]. "Classic" Mac OS is still in use on many older Macs, especially 68k Macs (Macs with a [[wp:Motorola 68000 family|Motorola 680x0]] processor), which are unable to run versions newer than 8.1. (In fact, many older Macs can't even run [[wp:Mac OS 8|OS 8]] at all.) Depending on the specific model, [[wp:PowerPC|PowerPC]] Macs support anywhere from [[wp:System 7|System 7.1.2]] up to OS X 10.5. (OS X 10.6 dropped support for PowerPC Macs.)

* [[wp:MacMacintosh OSoperating systems|Wikipedia's Mac OS page]]