Tom,

The whole point of Wine is that you are effectively running your Windows program within your Mac OS, so you can have your Mac specific programs open at the same time. That's its great advantage over dual boot or virtual box. No need to switch OS. In effect, Wine intercepts the Windows calls and implements them within Mac OS or, in my case, Linux. As I write this (Firefox in Linux), I have Noteworthy open and playing back a file through the midi in Linux.

It can only import dotted notes as ties

Are you referring to importing from midi? I find similar things with Noteworthy. A dotted crotchet will be imported as a crotchet tied to a quaver if the note "crosses" the beat. It's a nuisance, but is fairly easily dealt with by deleting the quaver and editing the crotchet to delete the tie and add the dot - assuming that's the problem you are having.