Now I can't launch from my user profile.
I have been able to run in recovery mode, where I can see the .dylib in question is there, but running in single-user mode I get the error:
dyld: Library not loaded: /usr/lib/libz.1.dylib
Reason: image not found
And, if I cd into lib, and type 'ls' libz.1.dylib isn't listed there.
Help please! (I'm out of my depth)