The Unix underpinnings, frameworks, and platform security model behind Apple's desktop OS.
How Disk Arbitration models disks, schedules callbacks, requests mounts and ejects, and separates notifications from time-critical approval decisions.
How coordinated reads, writes, moves, and snapshots interact with file presenters, accessor blocks, operation queues, packages, and cloud-backed documents.
How modern macOS apps register bundled background helpers with SMAppService, interpret approval status, migrate older installs, and avoid persistence traps.
How DriverKit packages, matches, activates, entitles, and isolates user-space driver extensions while preserving controlled access to macOS hardware.
How replicated File Provider extensions expose remote storage through Finder while macOS manages local copies, placeholders, enumeration, and change flow.
A defensive architecture for macOS Endpoint Security clients covering entitlements, event deadlines, cache policy, muting, message lifetime, and telemetry.
An evidence-first Rosetta 2 repair workflow for Intel Mac apps covering architecture, integrity, plug-ins, translation availability, data, and vendor support.
A non-destructive Time Machine local-snapshot workflow covering APFS accounting, inventory, backup health, supported thinning, deletion, and verification.
A correct mental model for macOS FSEvents streams, path coalescing, event IDs, per-disk persistence, dropped-event flags, exclusions, and rescanning.
A safe macOS profile workflow covering payload identifiers, scope, signing, MDM delivery, conflicts, inspection, removal, rollback, and effective-state proof.