Plug dongle into MBP and connect the HDMI cable to the dongle and then the receiver. Power up both devices and your TV. Set the receiver for whatever HDMI port you're using. Then, go into the "Displays" control panel under "System Settings" on your MBP. You may need to click the "Detect Displays" button in the lower right hand corner. Assuming your TV is properly connected to the receiver, it should "just work". If it doesn't , remove the HDMI cable from the receiver and connect it directly to the TV.