Topics Map > Teaching & Learning > Lecture Capture
Why is my Lecture Capture displaying a green screen?
If your lecture capture is displaying a green screen as seen below, it means the lecture capture device received a video signal but is not able to see it due to it receiving an encrypted video signal. This happens almost exclusively with Mac users. Unfortunately, Apple products use HDCP (a security protocol) to encrypt their video signals when using an HDMI output. There's two options available to circumvent this and ensure your Mac is lecture captured.
- Check if the touch screen has a Content Protection setting under the HDMI source selection at the touch screen.
- BEFORE connecting your Mac, set Content Protection to OFF.
- After setting Content Protection to OFF, you can connect your Mac to the HDMI cable.