It changes automatically OS X’s network location based on the name of Wi-Fi network and runs arbitrary scrips when it happens.

curl -L https://github.com/eprev/locationchanger/raw/master/locationchanger.sh | bash

It will ask you for a root password to install locationchanger to /usr/local/bin directory.

You have to name network locations after Wi-Fi networks. Let’s say, you need to have a specific network preferences for “Corp Wi-Fi” wireless network, then you have to create a location “Corp Wi-Fi”. Now, the network location will change to “Corp Wi-Fi” automatically, if you connect to that wireless network. And if you connect to the Wi-Fi network that you don’t have a location for, then the location will change to the default one (“Automatic”).

If you want to run a script every time you connect to a specific Wi-Fi network, then put those scripts in ~/.locations and name them after Wi-Fi networks. For instance, you have a script that changes security preferences when you connect to the “Corp Wi-Fi” network:

#!/usr/bin/env bash

# Require password immediately after sleep or screen saver begins
osascript -e 'tell application "System Events" to set require password to wake of security preferences to true'

Then name this script as ~/.locations/Corp Wi-Fi. And you might want to create ~/.locations/Automatic that will reset those changes:

#!/usr/bin/env bash

# Don’t require password immediately after sleep or screen saver begins
osascript -e 'tell application "System Events" to set require password to wake of security preferences to false'