On some models and versions of Mac, you may need to press Option as you click the Volume button to see all your output and input options. Click a different output device to change outputs. Click and drag the slider to change the volume. Click the Volume button in the menu bar.When using the keyboard, the up and down arrow keys control the volume, and the right. Supporting CEC requires built-in hardware support for this. Adjusting MacBook Resolution When Connected via HDMIMonitorControl - Now with Apple Silicon support Control your external display brightness and volume Use menulet sliders or the native Apple keyboard keysTo change the volume of the HDMI connection within the Mac requires either first converting the sound to analogue, modifying it, and then converting it back to digital, or it requires the Mac to support the CEC aka Consumer Electronics Control standard as mentioned in my previous reply. There is no volume control on your laptop with this option.
Click the Apple icon in the top left corner. Connect the HDMI cable from the classroom system to your laptop’s HDMI port. Changing MacBook Display Settings When Connected to a ProjectorTo change your MacBook's display settings, Get bootcamp for macSelect the Scaled option from just below the drop-down menu. From the Optimize drop-down menu, select Extron D. Click on the Display tab in the Display window. The Mirror Display check box is located in the bottom left corner. This option will show 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.If the desktop is mirrored, a secondary window will appear with options to adjust the resolution. ![]() Close all windows related to the settings for Display and System Preferences.
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