A:AnswerYes you can providing you have a method to hook up a sound bar to your cable or satellite box. This is a display monitor so it doesn't not have built in speakers.
A:AnswerThank you for your question. There are third party manufacturers who sell universal or specific speaker bars. HP does not officially make them and Best Buy does not have any available.
A:AnswerThank you for your question. Here are all the specs I have for this model. If you need any more information I would reach out directly HPs Tecnical department. https://support.hp.com/us-en/document/c05078309
A:AnswerIf the 12” MacBook has an HDMI or VGA output then yes. In some cases there are adapters that go from lightining (video output type) to HDMI or VGA, but this requires that your 12” MacBook has the output port. This monitor doesn’t do any wireless porting.