Mac OS: Difference between revisions

[[Category:Operating Systems]]'''Mac OS''' is the [[:Category:Operating Systems|operating system]] used in [[Macintosh]] computers since their introduction in 1984. The current version ofis [[Mac OS X]], which traces its roots to [[wp:NextStepNeXTSTEP|NextStepNeXTSTEP]], [[wp:Mach (kernel)|Mach]], and [[BSD]]. Pre-X versions of Mac OS were written in-house at Apple and were based in part on the slightly earlier, [[wp:Apple Lisa|Lisa Office System]].

"Classic" (pre-X) 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 run [[wp:Mac OS 8|OS 8]] at all.) Depending on the specific model, PowerPC Macs support anywhere from [[wp:System 7|System 7.1.2]] up to OS X.