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I would like to view or perhaps edit a file with no extension. It is a Mac OS X Universal Binary executable file which I downloaded from my iPhone.

I have both Mac OS X and Windows. Is there any way I could possibly open that file?

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In OS X, either use the normal TextEdit.app, or download a Hex editor like Hex Fiend and open the file.

However, there's not really a point in editing an executable file unless you specifically know what you're doing and what you're looking for (and I really doubt that). You'll probably just break its functionality.

If you have a file with no extension and you don't know what it is, use the file command from a Terminal to check.

$ file /usr/local/bin/ffmpeg
/usr/local/bin/ffmpeg: Mach-O 64-bit executable x86_64
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