1) You would need to download the following Microsoft's program and set up the .dmg : 

 

 

2) In the computer field you would to type the IP address you have received in your welcome email.

 

3) Enter "Administrator" for the username and the password provided in your email. 

 

4) In the Domain field, you would need to type another time your IP address. 

 

5) Click OK

 

That's it! You are logged in and you can use your Windows VPS from your MacOS X computer.