I am transfering a very large file from a network share over to my computer. Half way through, the person owning the network share shut his computer down. OSX gave me an error: "Finder cannot complete the operation because some data could not be read or written". Fine, so let me cancel the Copy and try again. Problem is, the little "X" button in the copy dialog doesn't do anything when I press it. My friend who owns the network share turned his computer back on but the Copy won't resume, it just sits there stuck halfway. When I try to shut my computer down to cancel the copy, it says "Cannot shut down because Finder is in the middle of a Copy operation". What do I do?