Was sent an "untyped binary data" file with no extension. It's audio. Using a Mac, I've tried adding the .mp3, .aac, .wav extensions, and it won't open. What now? [more inside]
In OSX how do I get files without extensions to be recognized by something other than Excel? Ideally I'd like them to be opened by the shell, or perhaps a new session in iTerm but iTerm is greyed out in the Choose Application menu.
How can I change/append an extension of a large number of files at once? [more inside]
How do you find out the extension of a file where it has been removed? I think it's a compressed file but I can't seem to get the slightest clue beyond that.