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Symptom: Apple device does not connect properly with classroom AV equipment, failing to send video to the projector.
Environment: Applies particularly to MacBooks and iPads trying to access Crestron AV equipment used in UWindsor classrooms.
Cause: MacOS outputs HDMI to HDCP at all times. If the Crestron system or any device in the chain isn’t HDCP-compliant, the MacBook may refuse to send video.
Resolution: Try these workaround solutions
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use AirMedia with the Apple device
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use the classroom computer