Second, if your network is encrypted and you are only seeing layer 2 traffic from various sources and not the higher layer protocols expected (which doesn't appear to be the case), then you must enter the WEP key into wireshark so it can handle the decryption. Nothing can be done about that unless you want to write your own. First, certain wireless cards' drivers do not support being put into promiscous mode. If you are connected wirelessly, there may be a few issues. If you are not connected via ethernet to you home router, most likely that home router than the home router uses a switch for its LAN ports and not a hub, thus each port has its own collision domain, whereas in a hub the collision domain is shared among all the ports and you would see all traffic on every port.

I am confident the network interface is in promisc mode because when I run ifconfig I get en0: flags=89.

How can I capture other computers traffic in Wireshark on a WiFi-network? seems to imply that it is not possible.

What do I need to do so that Wireshark, like Firesheep, can see and use the packets (particularly HTTP) from other network devices on the same network?

I only see SSDP broadcasts from 192.168.1.1.

Wireshark running on the MacBook sees the HTTP request from the Android device.

On the same network as the MacBook, I use an Android device (connecting via WiFi) to make HTTP requests.

I filter out all packets with my source and destination IP using the following filter ( ip.dst != 192.168.1.104 & ip.src != 192.168.1.104).

Wireshark installed and capturing packets (I have 'capture all in promiscuous mode' checked).

MacBook Air running Mountain Lion and connected wirelessly to a router.

Wireshark not capturing packets