The MacOS build was very much experimental when it first released, so there isn't much we can do there regarding the location of the saves, if you yourself don't know where they are unfortunately.
If it helps, I'm happy to send over a modified save with similar amounts of GOLD and LEVEL if you let me know what amount you had, and can place you at the beginning of v0.204, but you will need to unlock the 0.3 scenes again.
- RegalBuster