save to disk on a Mac question

New to this. I have been asking various people online this question. Hoping for an answer here. I am running Cave Story on a newer I-Mac with OS 10.4.8. The game seems to run fine escept for the fact that I cant save at any of the save points along the way. Which means I end up starting from scratch
a lot. Can someone tell me how to use the save to disk areas of the game?
Thanks! rogdj

 

I'd guess that you're running the application from a (locked) disc image.

First you need to copy Doukutsu.app to somewhere on your hard drive. Just drag it into your Applications folder, or your games folder if you have one.