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Note: It is critical that you install the correct version for your architecture - there were major changes in the handling of permissions with regard to setting the network interface to promiscuous mode.
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There's more to it than just the standalone app.) If it's not there, you will need to install X11 from your original OS X system discs. (If you're not sure you have X11, go into the Applications folder, then into Utilities, and look for the "X11" application. Note: You need to be root or an administrator to do this, and you MUST have Apple's "X11" framework installed. This is a crash course on getting WireShark (formerly known as Ethereal a powerful graphical front end to tcpdump) installed and running on your Mac, and how to do a few basic analyses of network traffic data. How to Install and Use WireShark on Mac OS X How to Install and Use WireShark on Mac OS X
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