There are many alternatives to Wireshark for Mac if you are looking for a replacement. The best Mac Network Analyzer alternative is tcpdump, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Wireshark and eight of them are Network Analyzers available for Mac so hopefully you can find a suitable replacement. Other interesting Mac Network Analyzer alternatives to Wireshark are Intercepter-NG, Ettercap, Debookee and Cocoa Packet Analyzer.
tcpdump is a common packet analyzer that runs under the command line. It allows the user to intercept and display TCP/IP and other packets being transmitted or received over a network to which the computer is attached.
Intercepter-NG is a multifunctional network toolkit for various types of IT specialists.
Ettercap is a suite for man in the middle attacks on LAN. It features sniffing of live connections, content filtering on the fly and many other interesting tricks.
Native Cocoa app for capturing and analyzing packets. Similar to Wireshark, but with a native interface (and less features). If you don't like the X11 GTK Wireshark, this is your app.
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It's open source and use CLI