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- APFS clones and snapshots: the kernel calls that make them work
- Apple Silicon and XNU: APRR, unified memory, AMX, Rosetta 2
- DriverKit: how Apple is moving every driver out of the kernel
- macOS security architecture: signing, sandbox, SIP, TCC
- Signals in XNU: where POSIX semantics meet Mach reality
- The XNU scheduler: bands, QoS, and how Mach decides who runs
- Inside APFS: copy-on-write, snapshots, and the sealed system volume
- IOKit and the driver model: how a Mac talks to its hardware
- Mach ports: how every macOS process actually talks to another
- The BSD personality: how XNU pretends to be Unix
- Virtual memory in XNU: pmap, the VM map, and the compressor