Hi I had just a quick question. I need to hook up a sound card, midi keyboard and my usb mouse to the MBP. I have this rock band usb thing that basically has one usb that goes into the port and converts it into 4 usb adapters that you can plug in your usb devices. http://www.google.ca/imgres?q=rockband+usb+4&um=1&hl=en&client=safari&sa=N&rls=en&biw=1546&bih=841&tbm=isch&tbnid=JoQPwQtG7ejO6M:&imgrefurl=http://www.bonanza.com/listings/Wii-Rockband-USB-4-Port-Expander-Hub-2-0-Gaming-Computer/38774767&docid=ioZkH2e7L3SnVM&imgurl=http://inlinethumb54.webshots.com/5877/2306281500028130014S600x600Q85.jpg&w=600&h=450&ei=mqHaTuPKH4SMgwfEh4TqDA&zoom=1&iact=rc&dur=276&sig=100346139819364549240&page=1&tbnh=144&tbnw=192&start=0&ndsp=28&ved=1t:429,r:25,s:0&tx=151&ty=93 This is the link for the picture of this device. will it affect my mac?