I have not seen this solution brought up, so try allowing tekkit through your firewall, and adding it to the safe programs list of your antivirus, if you do not know how to allow it through your firewall check this out:
http://windows.microsoft.com/en-US/windows7/Allow-a-program-to-communicate-through-Windows-Firewall
Launcher Version: 3.1.2
Operating System: Mac OS X Version 10.5.8
Java Version: 1.5.0_30
Antivirus Program:
Description of Problem:
When I launch tekkit it says 'The action run AppleScript encountered an error. Check the actions properties and try running the workflow again' according to my mac I am running the latest version of java, I have also tried the .jar which doesnt work. Please help!
Error Messages:
Error Log: