[KDE/Mac] Build kde apps on mavericks for older systems

[Boudewijn Rempt]

Hi,

I am wondering, is there a way to tell cmake to build for a more ancient 
version of OSX than the current one? I've got mavericks, but I'd like to 
build Krita for 10.8 or even 10.7. Is there some kind of switch?

Boudewijn