Without knowing (for sure) what Mac computer model identifier
build year you have or the OS X version and step of system
installed within it, an easy answer is not so likely....
And if your computer is not an old (before Intel Mac era) PowerPC
G3 or G4 iBook portable, then you are really out there! LOL
Adobe has a fairly good help page, depending on what you really
have, some answers or links within it can help. There would be no
new-ish Flash players for any Mac OS X that can run on PowerPC
hardware supported systems. Answers need details to work with.
•Flash Player Help - Adobe Flash Player:
http://helpx.adobe.com/flash-player.html
Good luck & happy computing! 🙂