Hello,
I'm a total packet sniffing newbie. I've read most of the relevant wiki pages on setting up the 4-way handshake that's required (password:SSID in IEEE 802.11 settings) to decrypt 802.11 packets but I can't see any such handshake taking place. I have not been able to find any of the reported "capture mode" settings. I have a whole slew of packets captured that are encrypted that I'd like to see the contents of.
I'm running macOS Mojave 10.14.3 on an intel iMac circa 2014. My wireless router (en0) is an Airport Extreme circa about 2010.
For the sake of argument, my WiFi password is "password" and the network name is "My Home Network" with spaces and all (not sure if spaces are allowed in the wpa-pwd key settings).