Apple Mac and Unix timestamps

Question

I know that the primary timestamp on Apple systems is the CF Absolute Time value (also called Mac Absolute Time), which is a 32-bit integer calculated by the number of seconds s

Answer 1

The NSDate object has timeIntervalSince1970, but that's based off the mach time. Meaning [[NSDate date] timeIntervalSince1970]-NSTimeIntervalSince1970 is equal to [NSDate timeIntervalSinceReferenceDate];