So I recently wiped my hardrive and reinstalled everything again (laptop became fast again ) but one of the problems i have only just noticed (28dec) is that the audio port had stopped working. It is selectively choosing whether to output audio through the port or the internal speakers. By this i mean that it will output audio through headphones (I have only tested with 3pin (e.g. iPhone) ones as this is all i have) but it refuses to work with a standard audio cable to my speakers (multiple cables tested). I have identified that it is a Mac software problem as the audio works fine in Windows 7 (bootcamp). There has been little help online, but has anyone had this problem or have ideas to resolve it (I dont really want to re intall everything again!!) Thanks!