Converting and Merging capture (.cap) files

Convert:

ivstools --convert [cap_file] [converted_file_name]

ivstools --convert [airportSniff2NfxpB.cap] [sniff.ivs]

Merging:

ivstools --merge [ivs_file1] [ivs_file2] ... [merged_output_file_name]

ivstools --merge sniff1.ivs sniff2.ivs sniff_out.ivs

Piping JTR to Aircrack

./john -incremental=All --stdout | aircrack-ng - e [ssid] -w - [capture_file]

Ex:

/pentest/passwords/jtr/john -incremental=All --stdout | aircrack-ng -e linksys4800 -w - airportSniffT7T3Rh.cap

Use OS X Airport for wireless sniffing

Scan for networks:

/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport en1 scan

Sniff:

sudo /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport sniff

Create a symbolic link to the binary so you can easily execute it from your path if you wish.

Resultant sniff will dump the *.cap file in /tmp. Use aircrack-ng to crack the cap file now once you've captured enough IVs and/or handshake.