Wireshark Wi-Fi traffic sniffing support across Operating Systems

Windows

Promiscuous mode

• WinPcap supports promiscuous mode but drivers for Wi-Fi NICs usually don't =>  Wireshark using WinPcap can't capture packets from Wi-Fi NIC in promiscuous mode on Windows

Monitor mode

• WinPcap does not support monitor mode => Wireshark using WinPcap can't capture packets from Wi-Fi NIC in monitor mode on Windows 
• Acrylic NDIS driver supports monitor mode => Wireshark + AirPcap/WiFi USB card +Acrylic NDIS driver is able to capture packets in monitor mode

Linux

Promiscuous mode

• libpcap supports promiscuous mode => Wireshark can capture packets from Wi-Fi NIC in promiscuous mode on Unix

Monitor mode

• libpcap supports monitor mode (on some flavors on Unix) => Wireshark can capture packets from Wi-Fi NIC in monitor mode on Unix

How to capture WiFi traffic using Wireshark on Windows
http://sourceforge.net/projects/libpcap/
http://www.tcpdump.org/