This file can be viewed from the command line with tcpdump, or with an app like WireShark. Opening the WCAP / PCAP Capture File in Mac OS X wcap extension and include the time of the packet capture, the name should look something like “2017.04.20_17-27-12-PDT.wcap”. The captured packet file will appear on the desktop with a. When satisfied with the length of the packet capture, or when sufficient network traffic has been sniffed, click on “Stop” to end the packet trace and to save the captured packet file to the Desktop of OS X.Select the Wi-Fi Channel and channel Width to sniff and capture packets for, using the wi-fi network stumbler tool can be helpful to identify which channels and widths to sniff network traffic for, then click “Start”.Ignore the splash screen and pull down the “Window” menu, choose “Sniffer” from the list of options in the Wireless Diagnostics menu.Choose “Open Wireless Diagnostics” from the list to open the wi-fi utility.Option+Click on the Wi-Fi menu item in the OS X menu bar.This process will automatically disconnect from any active wireless network and transmission on the Mac, instead dedicating the Macs wi-fi card to sniff wireless network traffic and to capture detected data into a packet transfer file. Then you take the pid of your app (27479 in this example) and run: nettop -p 27479Īnd you will see where the app is connecting to: Skype.27479 18 KiB 32 KiB 20 KiB On my machine I have: bytes_in bytes_out rx_dupe rx_ooo Open a Terminal and run nettop -P to get a summary of all the traffic generated by each application currently running together with their pid. On MacOSX there is a very helpful tool called nettop.
In my opinion wireshark is the wrong tool to do what you need. Then you can sniff all traffic coming out of the VM by sniffing the VM virtual network interface. One better way to do what you are trying to achieve with Wireshark is to setup a VM and run the app inside the VM. Once you find the tcp stream created by the app you can right click on the packet and choose 'Follow TCP stream'. You would have to close every other app running on your OSX to reduce the noise. Wireshark doesn't support isolating traffic for a specific app.
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