Body
Modified on: 2/27/26
MacBook to Classroom AV Connection Guide
Quick Reference for Faculty
Requirements
Modern MacBooks use USB-C ports (small, oval-shaped ports on the sides). You'll use a USB-C (blue) or HDMI (orange)(with adapter) cable, located on top of the lectern, to connect to classroom projectors.
USB-C PORTS
Look for small, oval-shaped ports on the left/right sides of your MacBook
Any USB-C port works for video!
⚠️ Users are responsible for bringing adapters!⚠️
Instructions
MacBook → HDMI (with adapter) or USB-C Cable → Projector
- Plug the USB-C or HDMI (with adapter) cable into any USB-C port on your MacBook
- Using the touch panel, turn on the projector and select the correct USB-C or HDMI input if needed
Mirror Your Display
To display the same content on your laptop and the projector:
Quick Method: Press ⌘ (Command) + Space Bar to access Spotlight Search→ Type “Displays” → Use as “Mirror for Generic_HDMI”
Manual Method: Apple menu → System Settings → Displays → Use as “Mirror for Generic_HDMI”
Select Audio Output
To play audio through classroom speakers:
Quick Method: Press ⌘ (Command) + Space Bar to access Spotlight Search → Type “Sound” → Output → Select "Generic_HDMI” or “AV System”
Manual Method: Apple menu → System Settings → Sound → Output → Select “Generic_HDMI” or “AV System”
⚠️ Always test audio before class starts!⚠️
Quick Troubleshooting
No picture?
- Ensure all connections are secure
- Verify projector is on
- Select the correct HDMI or USB-C input on the touch panel
- Try mirroring displays
No sound?
- Confirm “AV System", “Extron” or the connected display device is the selected audio output (click speaker icon)
- Check classroom volume is up on touch panel
- Ensure audio is not muted on your laptop
Display issues?
- Try a different port (HDMI vs USB-C)
- Disconnect and reconnect cable
- Restart your device while connected to the AV system
Quick Reference
SETUP CHECKLIST
1. Connect USB-C or HDMI (with adapter) cable to MacBook
2. Turn on projector
3. Mirror display
4. Select sound output
5. Test audio
Need help? Contact Classroom Technology Services:
Phone: 610-519-7777 (Option 1)