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Is there a way to run a script every time a network interface finishes coming up? Or, is there an equivilent answer to this Debian question on OSX?

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up vote 0 down vote accepted

I haven't tried this solution my self - yet, but found this thread:

You should consider using crankd, which precisely allows you to run scripts in response to many system events such as network changes, filesystem activity, application launching, etc.

As I couldn't find any sensible documentation, I also wrote a small blog post on getting started using crankd.

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I checked stackoverflow and the googles, but didn't happen across superuser. Regardless, this is it! Thanks. – Matt Dec 2 '11 at 2:22
"Getting started using crankd" has moved to… – RobM Sep 17 '15 at 15:09

A launchd agent watching /etc/resolv.conf, and two network related .plist files under /Library/Preferences/SystemConfiguration/ seems to work for me (in Mac OS X 10.8.4):

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" \
<plist version="1.0">





I had previously only used /etc/resolv.conf, but there were cases where that wasn't enough.

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