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Faculty, students, and staff can connect a MacBook via HDMI cable to a projector. Users can also change the settings for the connection, like audio, resolution adjustment, and the display. 

Connecting HDMI Audio with a MacBook

When connecting a MacBook to a classroom system via an HDMI cable, you need to tell your computer to output the sound through the HDMI output. 

1. Connect the HDMI cable from the classroom system to your laptop’s HDMI port. 
2. Power on the classroom system.
3. Select Laptop HDMI. 
4. Click the Apple icon in the top left corner.
5. Choose System Preferences. 
6. Click the Sound icon from the second row. 
7. Select the Output tab. 
8. Choose the Extron D option. 
9. When you have finished using the HDMI connection, remove the HDMI cable from your laptop; your laptop will default back to the internal speakers. 

Adjusting MacBook Resolution

When connecting to the classroom system via HDMI, decide if you want to mirror or extend your desktop.

Changing MacBook Display Settings When Connected to a Projector

1. Connect the HDMI cable from the classroom system to your laptop’s HDMI port. 
2. Power on the classroom system.
3. Select Laptop HDMI. 
4. Click the Apple icon in the top left corner.
5. Select System Preferences. 
6. Select Displays from the second row. 
7. Under the Displays window, select the Arrangement tab. 
8. The Mirror Display check box is located in the bottom left corner. This option shows the same image on the laptop screen and the projector. To show different images on the laptop screen and projector, do not check this box. 

Mirrored Desktop

If the desktop is mirrored, a secondary window will appear with options to adjust the resolution. 

1. Click on the Display tab in the Display window. 
2. From the Optimize drop-down menu, select Extron D. 
3. Select the Scaled option from just below the drop-down menu. 
4. You will be provided two options for resolutions. Select the the 720p option. 

Extended Desktop

When in the desktop is extended, you need to use both your MacBook screen and the classroom preview screen to adjust resolution rates.

1. Deselect the Mirror Display option under the Display Menu. 

2. On the classroom preview monitor, you will see a Display window. Select the Display tab on this window.

3. Scroll to the right to access the second screen.
4. Select the Scaled option.
5. You will be provided two options for resolutions. Select the the 720p option.

Once your settings have been selected, they will become the default settings when you connect your laptop the the classroom system again. Close all windows related to the settings for Display and System Preferences.

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