While working at Apple I made the mistake of thinking HR was going to be helpful. I was offered a new position there and took it but only on the grounds that I would not have any duties related to my old position. I was told that was acceptable. Three Weeks after starting my new role they started giving me my old duties back. I complained this was against the agreement we had on me accepting my new position. The HR ref played dumb and would only say "Well Apple has invested a lot of time and money into you, do you expect them to not utilize the you as a resource?" I had one additional encounter with them regarding a manager who had been, as I saw it, mistreating me. I was assured the conference between is was confidential. An hour after that meeting I was called into a room to sit and face three managers who grilled me about why I was dissatisfied with them. It was one of the most uncomfortable meetings I have ever had. I had no clue how to react and realized then and there my days were numbered. HR is definitely not your friend.