How To Enable Wireless Monitoring Macbook Pro I own a MacBook Pro Retina 15-inch, early 2013, and I would like to put the wireless card on board into monitor mode, but was unable to.

Any help would be greatly appreciated.
Use Terminal
You can use the airport utility.
It's located in a very obscure place, so I suggest creating a symbolic link to it:
ln -s /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport /usr/local/bin/airport

Now, you can put the WiFi (Airport) adapter into monitor mode:
sudo airport en1 sniff 6

This will sniff all packets on adapter en1 channel 6.  It will save a .cap file in /tmp/airportsniffXXXXXXXXX
You can view the output through Wireshark or issue the command tcpdump -r [filename].  For example, the following is the capture of my wireless adapter in monitor mode for a few seconds...
 18.0 24.0 36.0 54.0 Mbit] CH: 1, PRIVACY
17:37:37.746644 35635598us tsft 1.0 Mb/s 2412 MHz 11g -82dB signal -82dB noise antenna 0 Probe Response (yoyo) [1.0* 2.0* 5.5* 11.0* 18.0 24.0 36.0 54.0 Mbit] CH: 1, PRIVACY
17:37:37.774068 35662623us tsft bad-fcs 1.0 Mb/s 2412 MHz 11g -82dB signal -82dB noise antenna 0 Probe Response (LORRAINE) [1.0* 2.0* 5.5* 11.0* 18.0 24.0* 36.0 54.0 Mbit] CH: 1, PRIVACY
17:37:37.782831 35671401us tsft bad-fcs 1.0 Mb/s 2412 MHz 11g -84dB signal -82dB noise antenna 0 Probe Response (LORRAINE) [1.0* 2.0* 5.5* 11.0* 18.0 24.0* 36.0 54.0 Mbit] CH: 1, PRIVACY
17:37:37.793357 35683064us tsft 1.0 Mb/s 2412 MHz 11g -63dB signal -82dB noise antenna 0 Beacon (Go Noles ) [1.0* 2.0* 5.5* 11.0* 18.0 24.0 36.0 54.0 Mbit] ESS CH: 1, PRIVACY
17:37:37.796149 35686928us tsft wep 1.0 Mb/s 2412 MHz 11g -62dB signal -82dB noise antenna 0 Data IV:4767c7 Pad 20 KeyID 1
17:37:37.816820 35706464us tsft 1.0 Mb/s 2412 MHz 11g -79dB signal -82dB noise antenna 0 Beacon (yoyo) [1.0* 2.0* 5.5* 11.0* 18.0 24.0 36.0 54.0 Mbit] ESS CH: 1, PRIVACY
17:37:37.898203 35787820us tsft 1.0 Mb/s 2412 MHz 11g -62dB signal -82dB noise antenna 0 Beacon (Go Noles ) [1.0* 2.0* 5.5* 11.0* 18.0 24.0 36.0 54.0 Mbit] ESS CH: 1, PRIVACY
17:37:37.919172 35808864us tsft 1.0 Mb/s 2412 MHz 11g -81dB signal -82dB noise antenna 0 Beacon (yoyo) [1.0* 2.0* 5.5* 11.0* 18.0 24.0 36.0 54.0 Mbit] ESS CH: 1, PRIVACY


Use a GUI

Launch Wireless Diagnostics.  Press CommandSpace and start typing &quot;Wireless Diag...&quot;.  Press Return when Spotlight finds it.

Press ⌘7 (Window &gt;&gt; Monitor) to monitor the traffic on your Airport Adapter.




Press ⌘6 (Windows &gt;&gt; Sniff) to put the Airport card into &quot;Sniff&quot; mode.  Select your channel and start sniffing...


It will then start sniffing the network packets...When it's done, it will put a .wcap file on your desktop.  You can then use the file with Wireshark or with the tcpdump command.