To be perfectly honest with you, I have never updated either Flash or Air in all the versions and years Poser has been using them.  Back in the P8 days, SMS tech support told me to disable the auto updates.  They told me that the version of Flash or Air is adequate for the Poser's needs.  Since I have no real need for Flash or Air outside of the Poser library, I have all versions of Poser from P5 to Game Dev on my system.  This includes all the Pro versions.  Never updated Flash or Air.  Never had a problem. 

So, if the only thing Mac users need Flash or Air for is Poser, why not install the version that is part of Poser and let it go at that?