i successfully notarized a plain dylib file, which is dynamically loaded from a GUI application. It is not bundled into a framework, but it is just a plain mach-o dylib binary.
I wanted to staple the binary, but I always get error 73.
Is it possible to staple plain mach-o binaries (like command line tools or shared libraries)?
Is it necessary?
No, it is not yet possible to staple to plain Mach-O binaries. With Xcode 10.2, you can staple to any bundle type (including app & kext), dmg, and pkg.