Apple’s Mac OS X turns 25, has prospered across three hardware architecture changes — from PowerPC, through Intel x86, to Apple Silicon

Apple's Mac OS X celebrates its 25th anniversary, having navigated three hardware architecture shifts from PowerPC to Intel x86 and now Apple Silicon. Despite initial challenges during its launch in 2001, the operating system has evolved with features like protected memory and preemptive multitasking. The transition to Intel architecture was smoother due to prior experience and the UNIX foundation of OS X. The latest macOS version, Tahoe, has faced criticism for gatekeeper restrictions on running unsigned apps.