OSX32 dylib with MacOS-x86-64 platform?

Hello,

I need to update my old SteamWorks ANE to be working with new AIR20, but have problems with it on Mac. Here is my current code: Oldes/FRESteamWorks at AIR20_SteamWorks135 ... - GitHub

So far I managed to compile it on Mac without errors, but when I try to init in my app on MacOS, I get this error:

ArgumentError: Error #3500: The extension context does not have a method with the name AIRSteam_Init

Could you please let me know, if it's even in theory possible to have the Steam's osx32/libsteam_api.dylib working fine on 64bit OS? Is it somehow my fault that it is not working or some lack on Steam side, which would mean that Mac users will not get full functionality?

Thank you for any advice.

PS:

here are my another attempts to get some answer:

http://forum.starling-framework.org/topic/adobe-native-extension-ane-for-steamworks-on-osx

http://stackoverflow.com/questions/35038209/adobe-native-extension-ane-for-steamworks