Currently Being ModeratedNov 3, 2013 11:19 PM (in response to cjalcorta)
BACK UP ALL DATA IMMEDIATELY, then make a "Genius" appointment at an Apple Store for service.
Currently Being ModeratedNov 4, 2013 12:25 AM (in response to Linc Davis)
Does this happen mostly when you move or bump it?
The new macbooks have a HDD protection feature (I think). Our company got five new MB pro's and all of them make a click noise from the HDD when you move or bump them.
In any case, it is better to consult an Apple Genius.