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I have a Macbook Pro from 2011 currently running OS X Yosemite 10.10. Before i upgraded to Yosemite, i was experiencing a common wifi issue that was that the wifi disconnected from the internet and it couldn't be turn on or off; sometimes, when i turned on the mac, a "No hardware installed" message showed. I replaced the wifi card but the problem persisted and now that i upgraded the OS, the configuration didn't recognise any hardware and no Wi-Fi interface is shown on Network Preferences. I know there is a file Library/Preferences/SystemConfiguration/NetworkInteraces.plist that contains these interfaces information.

Is there anyway that i can configure this file to add the wifi card? or is there something else that i can do? knowing that replacing the wifi card didn't solve the problem and that it may be a software issue?

Thanks

  • does the terminal "airport on" do anything? – Ruskes Oct 19 '14 at 19:51
  • There is no such file on my 10.9.5 NetworkInteraces.plist – Ruskes Oct 19 '14 at 19:56
  • the "airport on" command displays something like the man of the "airport" command – JsMartinez Oct 19 '14 at 22:25
  • sorry, try this to turn the wifi on "networksetup -setairportpower en0 on" – Ruskes Oct 20 '14 at 2:13
  • It shows "you cannot set wifi power because all airport network services are disabled" – JsMartinez Oct 20 '14 at 19:32
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It's possible that Wi-Fi service is disabled in your system, check by:

sudo networksetup -listallnetworkservices

If you see an asterisk (*) next to your WiFi, that means the service is disabled. Enable it by:

networksetup -setnetworkserviceenabled WiFi on
networksetup -setairportpower en0 on

Same for any other network services which are disabled. See also this post and this post.

Then restart your system to start these services at startup.

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