2.4 vs 5Ghz band

[Sekrit]

Macbook Air has dual band wifi-n radio. I want it to use non-congested 5 Ghz band but keep 2.4 Ghz as a backup. Often times it switches to 2.4 Ghz. Is there a way to force it to use 5 Ghz?

[Lantis]

Pretty sure in the Wireless settings on the mac where it remembers all of your networks you have previously joined.
You can re-arrange the list and it priorities them from top to bottom.

[lilunxm12]

to do this you need to set differenet ssids for bands and adjust the priority in osx's internet setting

[Sekrit]

Thanks, moving the 5G connection to the top of the list was the solution.