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Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

otool

The macOS tool that lists what is inside a Mach-O file: its load commands, sections, libraries and disassembly.

otool (llvm-otool in LLVM) displays Mach-O structures: -l load commands and sections, -L linked libraries, -tv a disassembly of the text section, -r relocation entries.

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