Step 7: You can edit the rest of the settings for your convenience, however, from this point on, clicking Add again will create the RDP connection and it should immediately appear in the Desktops list on the default interface.
Step 8: On the default page, select your newly added connection. If you skipped step 6, you will be asked to provide a username and password, if not, you may see a certificate warning. Click on Continue and enjoy being able to control a Windows device from an Apple one.