This article applies to: Montage Linux box, Montage Mini, Montage Lite, Montage Windows Receiver
Yes these can be a mix of Windows, Mac, Chromebook, iOS and Android devices.
Up to 6 screens can be shared on Montage* and the Montage Windows receiver*.
Up to 4 device screens can be shared on Montage Lite or Montage Mini.
*Note: The Montage Linux box supports a maximum of 2 concurrent users connecting via Chrome web client/iOS App/Android App. Subsequent connections will be presented with the below alert when trying to connect.