>Apple workers were in actual offices with locks due in part to Apple's obsession with secrecy ( 1 or 2 to an office )
I don't have the cites handy but my recollection is that the specific iPhone teams (hardware and software) were working long hours in the open around conference tables. That subgroup was isolated from the rest of Apple employees because of the secrecy so yes in that sense, they weren't "open" on the gigantic scale of Facebook.