Imax - first, disclosure - I am the Vendor of Pose Magic.

Second - it doesn't do what you want it to do automatically.  Instead, Every possible posing dial is on one parameter pallette, instead of (or in addition to) being spread out on nearly 50 different body parts.

So, you've got one master list, very carefully arranged in (already) logical groups.  Every dial is there, the main benefit being you don't have to move off this palette to pose your figure.

As to your particular problem, what you'd do is decide whether you like the grouped arrangements or you could move things around.  You'd only have one list to work with, instead of 50-ish, and in that there'd be no redundancy.

Further, you'd have a lot of extra posing controls you don't have on the figure itself.  For example, instead of bending the left leg and then bending the right, you can bend both legs with one dial.  You can then go assymetric by using the Legs Split dial, which bends one forward and one backward at the same time.

It may very well work on a Mac, and it should, but I don't have a Mac, nor do I plan on getting one ;)