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I've just learned that apparently MacBook Air mid-2012 outputs an enormous amount of power for the wireless interface, namely almost 1500mW, i.e. 1.5W!

By any measure that's an overkill and exposes users to unnecessary, quite large, amounts of radio power.

I was wondering if, what is usually referred to as "tx power" can be adjusted somehow to something signifcantly lower, say 50-100mW?

I've been googling away for the most part of the day and found nothing.

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Have you downloaded and tried the Airport Utility? support.apple.com/kb/DL1628 it is supposed to provide the ability to adjust your transmit power settings –  Bon Gart Jun 1 '13 at 18:32
    
Well, it is installed by default but I don't see where I can change "tx power" in this app. –  ILIV Jun 2 '13 at 6:03
    
(facepalm) Airport Utility 5 has the ability to adjust transmit power. Version 6 does not and here is a discussion about it discussions.apple.com/thread/3700424?start=0&tstart=0 I wish I had known this before I made the suggestion. It may be possible to install the previous version though, as covered in that thread. –  Bon Gart Jun 2 '13 at 12:17
    
Hey, easier on yourself sport :) I'm going to look into that thread and try to install v.5, because 1,5W is most probably going to give me cancer or something in the long run. Thank you. I'll report back if it's possible to do what I want or not. –  ILIV Jun 2 '13 at 17:13
    
Alright, so it doesn't do what I need to do. Btw I found another way to install v5.6.1 described here discussions.apple.com/thread/4172563?start=0&tstart=0 In case I wasn't clear enough, I'm not talking about AirPort base station aka wireless router/access point but the wi-fi card/chip inside a Macbook Air. –  ILIV Jun 2 '13 at 17:33

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