I'm in need of a Mac zip app which allows me to compress files within a zip folder to different degrees - specifically, I need to leave one file uncompressed while two folders within it are both compressed (it's for an ePub file). I've previously done this (on Windows) by creating a zip archive of that single file without any compression, then adding the two folders to that archive and compressing them.
7zip does this on Windows, frinstance, but I haven't been able to find an option for the Mac. Does anyone have any suggestions???