I'm a newbie with mac products. I've had an iPhone 3 & 4 and now want to move up to iPhone 5 but I can't backup my info on my macbook. I just don't know why I can't even access the internet or even shut the macbook down to try and reboot it. I admit, I mainly use my PC for everything but would like to become more acquainted with apple. Would I 'hurt' anything by disconnecting the power cord and then trying to reboot...