问题 I made an Application using my Mac with Yosemite. On Completion of that I archived it and Then distribute to few friends, one of them have Mavericks. I faced some issues on that Mavericks System. With the occurrence of this thing, following queries raised in my mind, Can I check my application on different OSX version, without running it actually on different MACs? Can I also debug my application with different OSX Versions, using a system having single Osx? In Nutshell, I want to know, is it