Over the last couple of days I've spent time hunting up resources - tutorials and the like - and sometimes come across references to Inventor Fusion 2013. It implies that this version is available on the Apple App store. I have downloaded Fusion from the app store and it's definitely 2012. Could someone clarify please ? I suspect I may have misread something.
On windows the version is called Inventor Fusion 2013.
On Mac the version is still a technology preview. It is called Inventor Fusion Technology.
The Mac version was written from scratch so it is not as complete as the Windows versions. The tech PReview was intended to let people try Fusion as we work to get parity between the two platforms. I hope that makes sense.
15" Macbook Pro Retina - OSX 10.9 in Portland, Oregon