Lid Angle Sensor
While the lid of the new MacBook Pro is pretty much identical to past models, there is at least one new component related to it: a “lid angle sensor.” That’s according to a recent internal Apple Support document obtained by MacRumors and later confirmed by iFixit.
The magnetic sensor itself, which faces the left side hinge of the lid, appears to be much more sophisticated than the sensors that previous MacBooks used to determine whether their lid was open or closed. iFixit theorizes that this sensor could give Apple techs much more minute detail about the lid operation, but it could even be used for a currently unknown macOS feature down the road.