Thank you for your post.
If you forget your password, FileMaker cannot recover it. Hopefully, you kept another copy of the file without a password.
Exist any software out of filemaker for mac that I can use to recover it?
I've heard anecdotally of software that can save a copy of your file without the data that manages accounts (in effect, unlocking the file). I haven't tried any, though, and I wouldn't know which ones are trustworthy/reliable. I expect the wrong software could just leave you with a corrupt file or spyware.