He, a new baby! Congratulations!!
Maybe you will need the wall bracket for the BS5. You could install it two metres high at the wall, so no baby will touch it.
Ok, you will need a ladder to control it.....
To connect the mac and a Beomaster to your BV7 (-32?) you can try to use the component input for the mac (I think there is a DVI - comp. converter made by apple and the BM5 connected to the DVI input. BM5 will be controlled via masterlink (I think - this is how my BM1 is controlled).
I have connected my BM1 to the VGA socket of my BV7-40 MKIII. My Mac mini is connected to HDMI input in DVD2 mode and controlled via PUC (Apple remote). To get analog signals for link rooms I use a Gefen HDMI - composite converter for video and a Philips surround headphone amp as a digital - analog converter for audio. Works great.
Stefan