QC constants added in 10.7

gistfile1.m

#if defined(MAC_OS_X_VERSION_10_7) && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7)
    if (&QCPlugInAttributeCategoriesKey != NULL) {
        NSArray* categories = [NSArray arrayWithObjects:@"Utility", nil];
        [attributes setObject:categories forKey:QCPlugInAttributeCategoriesKey];
    }
    if (&QCPlugInAttributeExamplesKey != NULL) {
        NSArray* examples = [NSArray arrayWithObjects:
            [[NSBundle bundleForClass:[self class]] URLForResource:TTExampleCompositionName withExtension:@"qtz"], nil];
        [attributes setObject:examples forKey:QCPlugInAttributeExamplesKey];
    }
#endif