RDS Windows Server 2012 R2 - Problems in access from Mac OS X Remote Desktop

Hello,

I'm having problems with access via Remote Desktop App from Mac OS X to RD Gateway (Windows Server 2012 R2).

My system is mounted as follows:

1 Windows Server 2012 R2 with roles/applications (GATEWAY):

• RD Broker;

• RD Gateway;

• RD Web Access ;

• RD Licensing;

• Active Directory;

• DNS Server;

• SQL Instance (default instance for RD Broker);

• IIS;

1 Windows Server 2012 R2 with roles (APP01):

• RD Session Host;

1 Windows Server 2012 R2 with roles (APP02):

• RD Session Host;

The problem is that when I try to remotely access an application get the following error (and authentication is correct):

Translation from Portuguese:

"Other User"

"The username or password are incorrect. Try again."

If I put OK, then I enter the same password and same username and I connect successfully.

Through Windows I have no problem !!!

Someone help me?