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Pressing the Option key when clicking on the radio menu shows a lot more modes, so it's possible to put it in dual band n-only.

But I still don't see how to disable the 2.4GHz band altogether.
 
Pressing the Option key when clicking on the radio menu shows a lot more modes, so it's possible to put it in dual band n-only.

But I still don't see how to disable the 2.4GHz band altogether.
Seems odd to me... if I have no need for 2.4GHz connectivity why would I not be able to turn it off? Otherwise it's just another hole for somebody to get access, and there's a lot more 2.4GHz stuff out there than 5GHz.
 
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