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Jim Young changed bug 9921

What	Removed	Added
CC		jyoung@gsu.edu

Comment # 2 on bug 9921 from Jim Young

Until some type of API is made available, the OS X "airport" utility can be run
in a terminal window to do what you need. 

The airport utility itself is buried deep in the System folder...

> $ sudo find /System -name airport -print
> Password:
> /System/Library/PrivateFrameworks/Apple80211.framework/Versions/A/Resources/airport
> $

Set up an alias for it or put it (perhaps temporarily) in you $PATH.

Some of the airport options will require admin privs to run, others don't.  The
airport command with no parameters will display its various command line
options.

Use the --getinfo option to list current channel (and other useful info).

$ airport --getinfo 

> $ /System//Library/PrivateFrameworks/Apple80211.framework/Versions/A/Resources/airport --getinfo
>      agrCtlRSSI: -58
>      agrExtRSSI: 0
>     agrCtlNoise: -92
>     agrExtNoise: 0
>           state: running
>         op mode: station 
>      lastTxRate: 78
>         maxRate: 144
> lastAssocStatus: 0
>     802.11 auth: open
>       link auth: wpa2
>           BSSID: xx:xx:xx:xx:xx:xx
>            SSID: HereIsMynetwork
>             MCS: 12
>         channel: 153
> $

Use the --channel=XXX option to set the channel to use.

> $ sudo /System//Library/PrivateFrameworks/Apple80211.framework/Versions/A/Resources/airport --channel=161
> Password:
> $


Run the airport --getinfo command a second time to confirm the channel change.

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