![]() Unfortunately, 1) Apple haven't documented what magic they do to make that work (the "sniffer" is tcpdump, but it's apparently handed some Special Privileges to let it capture in monitor mode, and you don't get to, for example, pass a capture filter to it), 2) that appears to disassociate you from whatever wireless network you're on (older Macs could sniff in monitor mode and remain associated I don't know if that's a hardware or software difference), and 3) I've had trouble reassociating after stopping the capture. This mode is normally used for packet sniffing that takes place on a router or on a computer connected to a wired network or one being part of a wireless LAN. I run vmware on MacBook and normally I get a prompt to enter my MacBook pass to enable promisc mode. ![]() There is the sniffer in Wireless Diagnostics Option+click the Wi-Fi item in the menu bar, select "Open Wireless Diagnostics.", select the "Sniffer" window from the Windows menu, and start capturing. It steps you through what to do on the local Linux system. The answer, at least for newer Macs, appears to be "because Apple failed to make monitor mode work normally with Mojave or later on newer machines". Sometimes there’s a setting in the driver properties page in Device Manager that will allow you to manually set promiscuous mode if Wireshark is unsuccessful in doing so automatically. In other words, the answer to your question is the same as the answer to "Why does tcpdump not capture any data when in monitor mode?" If you’re using the Wireshark packet sniffer and. Click the red Stop button near the top left corner of the window when you want to stop capturing traffic. Sent via: Wireshark-users mailing list <. To check if promiscuous mode is enabled, click Capture > Options and verify the Enable promiscuous mode on all interfaces checkbox is activated at the bottom of this window. If you are on a PowerPC Mac, launch the Wireshark 0.99.5c (ppc).mpkg installer package and follow.I've also run the tcpdump -i en0 -I command in the terminal and no packets showed up. Promiscuous mode (you’ve gotta love that nomenclature) is a network interface mode in which the NIC reports every packet that it sees. It seems odd that monitor mode would work well but promisc support would be broken.
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