I have a program which needs to behave slightly differently on Tiger than on Leopard. Does anybody know of a system call which will allow me to accurately determine which version of Mac OS X I am running. I have found a number of macro definitions to determine the OS of the build machine, but nothing really good to determine the OS of the running machine.
Thanks, Joe
Could you just check for the presence of a capability? For instance:
if (NSClassFromString(@"NSKeyedArchiver") != Nil)
or
if ([arrayController respondsToSelector: @selector(selectedIndexes)])
then you know that the operating system does what you need it to do, not that Apple's product marketing group gave it a particular number ;-)
within your program you can use Gestalt. Here is the code I am using for my program to obtain the OS version.
long version = 0;
OSStatus rc0 = Gestalt(gestaltSystemVersion, &version);
if((rc0 == 0) && (version >= 0x1039)) {
// will work with version 10.3.9
// works best with version 10.4.9
return; // version is good
}
if(rc0) {
printf("gestalt rc=%i\n", (int)rc0);
} else {
printf("gestalt version=%08x\n", version);
}