mach_o_sys is used at run time in 18 crates (of which 17 optionally). It is a direct run-time dependency in 5 crates.

Depender (with downloads and own rev deps) mach_o_sys version
1.9K 8 remoteprocess ^0.1.1
150 mach_o ^0.1.1
110 t-rust-less-lib ^0
udbg ^0.1
memlibload ^0.1.1