OS X version checking in Cocoa

Question

I am developing a Cocoa application and need to check whether the current OS X version is OS X 10.6 Snow Leopard

If the current version is Snow Leopard, I need to cl

Answer 1

There are a couple ways you could do this.

1. You could check for the existence of a 10.6 only class:

   Class snowLeopardOnlyClass = NSClassFromString(@"NSRunningApplication");
   if (snowLeopardOnlyClass != nil) {
     NSLog(@"I'm running on Snow Leopard!");
   }

2. Use a system function (like Gestalt) to determine the OS version:

   #import 
   SInt32 major = 0;
   SInt32 minor = 0;   
   Gestalt(gestaltSystemVersionMajor, &major);
   Gestalt(gestaltSystemVersionMinor, &minor);
   if ((major == 10 && minor >= 6) || major >= 11) {
     NSLog(@"I'm running on Snow Leopard (at least!)");
   }