[users] how to open/use older version

I have the Chirp software on my old MacBook Pro (cira 2009) Running version 10.10.5. I can no longer open it on that laptop. I was trying to load each profile to my Baofeg UV-5R to move them to my newer MacBook Pro., but I'm not able to open Chirp on my older model. Am I out of luck or is there some way to open the older chirp version?