MacOS – Why did OSX 10.9.4 Internet Sharing stop working

internet-sharingmacos

I had Internet Sharing working correctly on my iMac with OS X 10.9.4. I was sharing my connection from ethernet to computers using Wi-Fi.

After I rebooted, my iPhone can connect to the Wi-Fi connection from the iMac OK, however has no internet access. I can access the iMac's local server pages, but not google.com etc.

I have rebooted numerous times. What can I do to fix this issue?

I am behind a cooperate proxy which settings are set correctly.

Best Answer

The best option here is to speak to your employer's technical support people.

If their policies permit the sharing of the wired corporate network to wireless devices they should assist you in setting up the connection or at least point you in the right direction.

If they do not, then it is probably best not to breach their policies.

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I found a relatively simple solution not involving a system restart - just bring the WiFi interface down and then back up:

$ sudo ifconfig en0 down
$ sudo ifconfig en0 up

In my case en0 is the AirPort interface of my MacBook Air.

Note that turning the AirPort off and on again doesn't work, but bringing the interface down does the job.

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From my own experience Internet Sharing is not, and has never been, as reliable as it should. Connection coming back and forth is a usual behavior of the service, heavily depending on the usage of the machine which is sharing the internet connection.

Apparently, updating to 10.7.4 makes things even worse.

Best Answer

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