How to get the OS X system version?

Question

I want to get the OS X system version, such as: 10.5.4, 10.4.8, etc. I want to get it in my app, how do I do this? Thanks!

Answer 1

You can use Gestalt:

SInt32 version = 0;
Gestalt( gestaltSystemVersion, &version );
BOOL leopard = ( version >= 0x1050 );

if ( leopard )
{
    //draw it this way
}
else
{
    //draw it that way
}

Keep in mind if you're checking if a method is available or not, it's better to test that directly using respondsToSelector:.