A:AnswerThese speakers use a 3.5mm connection for audio. If your Macbook Pro has a 3.5mm audio socket, then you can use that for the speakers to connect to.
A:AnswerThey connect via a 3.5mm auxiliary connection. So, assuming you have a 3.5mm jack on the old system then yes. However, I wouldn't recommend it. These are computer speakers. If you have an AV receiver, you're better off getting a decent set of bookshelf speakers and connecting them using some 12 Guage speaker wires.