The simplest choice if you have a Mac is to use Turbotax on-line, as I do.
And yes, you pay on a per-return basis.
You can run PC Turbotax on a Mac that is running Windows 7 or 8.1, but there isn't much feedback available on this approach. My feeling is that not many people want to run Windows on their Macs , even though it's doable today.
