Add some Mac-specific ignores
Add some Mac-specific ignores

jasonzou/MyPapers,jasonzou/MyPapers,flowsta/bibserver,okfn/bibserver,okfn/bibserver,okfn/bibserver,flowsta/bibserver,jasonzou/MyPapers,okfn/bibserver,flowsta/bibserver,jasonzou/MyPapers,flowsta/bibserver,jasonzou/MyPapers