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A simple tool for visualizing all incoming and outgoing Ethernet packets.

I wanted to learn how to read raw Ethernet packets on Mac OS X. After going through several examples, I ended up writing this little piece of software. It uses the Berkeley Packet Filter device to read all incoming and outgoing Ethernet packets. I have wrapped the whole thing in a Cocoa GUI using the new bindings features of Mac OS 10.3.


  • Reads all incoming/outgoing Ethernet packets
  • Displays the packet content in hexadecimal/ascii
  • Finds any string in packet
  • Filters packets
  • Dynamic display width
  • Save/load packets to disk

What's New in Ethernal

  • export packets to text file (multiple selection supported in packet list)
  • new preferences panel allowing to create additionnal protocol information
  • display protocol name
  • display source and destination IP address (value and resolved name)
  • selection is preserved when packets are added to the list
  • deselect a row if the row was selected
  • last selected interface is now

Requirements for Ethernal

Mac OS X 10.3 or later
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Ethernal User Discussion

4.3 1
Current Version (1.x)
Downloads 4,447
Version Downloads 2,375
License Free
Date 25 May 2005
Platform OS X / PPC 32
Price Free
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