The standalone air installer works fine on windows and can install our app fine too. But we have been unable to make it work on two different macs, unless AIR is already installed (it just installs our app correctly then as identified by the .cfg)
Its fails right at the end with the error:
Sorry, an error has occured
An error occured while installing Adobe AIR. Installation may not be allowed by your administrator. Please contact your administrator.
NB: the normal Air installer from http://get.adobe.com/air/ installs air just fine.