"movie can be played only on displays that support HDCP"
I have a brand new Hitachi LCD projector. I have bought movies through iTunes and when I go to play them connecting my MacBook air to the lcd projector I get this message "movie can be played only on displays that support HDCP" It does not happy with every movie...some work some don't. How can I fix this?
MacBook Air 13″, macOS 10.13