Upgrade SEPM to 12.1.4013 MAC client

So I hjave upgraded my SEPM to 12.1.4013 and pushed it out to my PC clients.  I want to do the same for my MAC clients and i haver downloaded the install package from the Symantec website.  I thne go to SEPM and choose admin-->install packages and click on add a client install package.  I then give it a name and choose the zip file that i just downloaded.  it then says uzipping the package and it then erros out saying out the specified zip file is not a valid MAC package.  Only Mac packages can be added in *.zip format.  Waht gives?  Thanks.