Apple have sold 140 million Macs running some form of OS X to date in the 28 years they have been available on the market. It sold 55 million iPads to date, and sold 22 million iPods in the first five years since the first device were out on the market. The company sold around 175 million iPhones to date, with 37 million of them in the last quarter alone.
In a nutshell: the iOS device collective reached 316 million cumulative units at the end of last year, while the Mac collective sold only 122 million cumulatively to date.
Transcript: Apple CEO Tim Cook at Goldman Sachs