How can I modify the strings of a binary(Mach-O) file?

Question

Is there any way to (easily) modify a string in a Mach-O binary? I want to extend the length of a pre-existing string.

Answer 1

Here's a tutorial on patching mach-o executables, just skip the disassembly stuff. ;) Basically, you need to sign the executable after you modify the strings. As for extendind strings - you really need to understand executable format and disassembly to do that.