The Unix underpinnings, frameworks, and platform security model behind Apple's desktop OS.
Why Boot Camp stayed Intel-only on Apple Silicon, what native Windows would require, and how Microsoft now supports licensed Windows 11 Arm virtual machines.
How Apple spent a decade signaling the end of 32-bit app support before removing it in October 2019, making the transition smoother than it could have been.
Released September 25, 2017, High Sierra converted flash-storage Macs to Apple File System automatically — the biggest Mac filesystem shift in decades.
Released September 13, 2000 for $29.95, the 'Kodiak' public beta gave Mac users their first hands-on look at Aqua, preemptive multitasking, and protected memory.
The T2, introduced in the 2017 iMac Pro and rolled out through 2018, took boot security, storage encryption, and other sensitive functions off the main CPU.
An operational account of Catalina's zsh default: which accounts changed, what stayed on Bash, and how administrators could migrate without breaking scripts.
Apple's multi-year push to deprecate kernel extensions for user-space System Extensions and DriverKit, and what changes when a driver runs outside the kernel.
Why traditional plain-text syslog couldn't keep up with modern macOS, and how unified logging's structured, activity-tracing design fixes that.
Why macOS's kernel is neither a pure microkernel nor a pure monolithic kernel, and what that hybrid design actually buys in practice.
The IPC framework behind most of macOS's privilege separation, built on Mach IPC but designed to make secure, sandboxed communication the easy default.