https://en.wikipedia.org/wiki/Mach-O#Multi-architecture_binaries https://en.wikipedia.org/wiki/Mach-O#Multi-architecture_bina... It was previously 0xfeedface.

https://en.wikipedia.org/wiki/Mach-O#Multi-architecture_binaries https://en.wikipedia.org/wiki/Mach-O#Multi-architecture_bina... It was previously 0xfeedface. Personally, I quite like 0xdeadbeef (I'm not vegetarian), less morbid than 0xdeadbabe anyway.