How to check Mac OS X version at runtime

Question

I am using below code to check OS X version at runtime.

if (floor(NSAppKitVersionNumber) <= NSAppKitVersionNumber10_10)
{
    /* On a 10.10.x or earlier s         


        

Answer 1

If you need to support multiple systems (you can adapt method return value):

#import 

+ (NSString *)systemVersion
{
  static NSString *systemVersion = nil;

  if (!systemVersion) {
    typedef struct {
      NSInteger majorVersion;
      NSInteger minorVersion;
      NSInteger patchVersion;
    } MyOperatingSystemVersion;

    if ([[NSProcessInfo processInfo] respondsToSelector:@selector(operatingSystemVersion)]) {
      MyOperatingSystemVersion version = ((MyOperatingSystemVersion(*)(id, SEL))objc_msgSend_stret)([NSProcessInfo processInfo], @selector(operatingSystemVersion));
      systemVersion = [NSString stringWithFormat:@"Mac OS X %ld.%ld.%ld", (long)version.majorVersion, version.minorVersion, version.patchVersion];
    }
    else {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
      SInt32 versMaj, versMin, versBugFix;
      Gestalt(gestaltSystemVersionMajor, &versMaj);
      Gestalt(gestaltSystemVersionMinor, &versMin);
      Gestalt(gestaltSystemVersionBugFix, &versBugFix);
      systemVersion = [NSString stringWithFormat:@"Mac OS X %d.%d.%d", versMaj, versMin, versBugFix];
#pragma clang diagnostic pop
    }
  }

  return systemVersion;
}