Thanks for the quick reply, I am referring to the photo associated with my apple ID however I have gone through Mac HD/users/my name/picture and takes me to i photo library and photo booth library yet both are empty I have a Macbook air it is new and so there aren't any pictures on it- but I took a photo for my apple ID so i'm thinking it must be on here somewhere!?
Go to your Pictures folder and then right click on your Photo Booth Library. Select "Show Package Contents". Now click on pictures. Your picture should be there that you took with the camera on your Air.