Unity 5 project update issue

Hello, I am trying to update my project from unity 4.6 to Unity 5 and I am having a problem with .max files.

I am working with OSx and using unity 4.6, I had no problems with .max files as they were being imported using a Windows machine and I pull the changes from the asset server. Unity always should me the error that max files import is not supported on OSx, but the models worked correctly.

When trying to upgrade to Unity5 on OSx, the .max files are never working, and I upgraded the project on the windows machine and tried to pull the changes from the asset server.

I tried everything:
-visible meta files
-hidden meta files
-asset server
-copying the entire project folder
-copying only the assets and project settings folders

The only thing I have not tried is exporting the entire upgraded project as a package, but I am almost sure that it will not work as well.

Any help would be appreciated, and yes I know that .max files are not supported on OSx, but it used to work with unity 4.6.
Thanks

Which version of maya do you have? It requires latest version of maya on 5.0.

I am sorry about the confusion, but I meant .max files. I edited the original post to fix the mistakes.
FYI: I am using max 2014

Well max files are not supported on OS X since there is no 3dsmax on OS X.

Yes I know that, but how come did it work with Unity 4.6.
Unity showed me the error that importing .max is not supported, but the models were working.

Probably it was just using different or some old references but not .max.