I bought a MacBook two months ago. Works great, I should say, but right now there is no way to edit GENS Roms outside of straight hex-editing. And I'm not particularly well-versed in hex (though I have read the tutorials so I have some basic idea).
It will take a lot of work, I am aware of this, but me and any other Mac NHL94 players that may be lurking about could really appreciate having a compatible version of NOSE.