On the mac to have an application start automatically for all users add the application to the file “loginwindow.plist” in /Library/Preferences.
An example:
<?xml version=”1.0″ encoding=”UTF-8″?><!DOCTYPE plist PUBLIC “-//Apple//DTD PLIST 1.0//EN” “http://www.apple.com/DTDs/PropertyList-1.0.dtd”>
<plist version=”1.0″>
<dict>
<key>AutoLaunchedApplicationDictionary</key>
<array>
<dict>
<key>Hide</key>
<false/>
<key>Path</key>
<string>/Applications/PCClient.app</string>
</dict>
</array>
</dict>
</plist>
For details see:
https://sites.google.com/site/selkirkitknowledgebase/home/mac-os-x/startup-item-for-all-users