I really missed using things like ldd and strace from my old linux workstation. The OSX equivalent tools are

• otool, e.g. otool -L mybinary.x to see what libraries are linked
• dtruss or dapptrace for tracing binaries, e.g. sudo dtruss -f mybinary.x you need admin access to run dtruss which is a little annoying, but it's better than nothing.