Tunnelblick comes set up to be built using Xcode 3.2.2 on OS X 10.6.8 but can be built with Xcode 5.1.1 on OS X 10.8.5 or Xcode 6.3 and higher on OS X 10.10.3 or higher.

• PowerPC and Intel processors and OS X 10.4 - 10.10 are supported only when Tunnelblick is built using Xcode 3.2.2 on OS X 10.6.8.

• Xcode 5.1.1 and 6.3 and higher only generate 64-bit Intel code and are for use on OS X 10.6 - 10.10 and higher only.

To use Xcode 3.2.2 on OS X 10.6.8:

Double-click tunnelblick/Tunnelblick.xcodeproj to being using Xcode.

To use a different version of Xcode on a different version of OS X:

1. Quit Xcode

2. Replace

     tunnelblick/tunnelblick.xcodeproj

   with a tunnelblick.xcodeproj from the appropriate folder:

     tunnelblick/xcodeproj-versions/xcode6.3   (on OS X 10.10.3)
   
     tunnelblick/xcodeproj-versions/xcode5.1.1 (on OS X 10.8.5)
   
     tunnelblick/xcodeproj-versions/xcode3.2.2 (on OS X 10.6.8)

3. Double-click tunnelblick/Tunnelblick.xcodeproj to begin.

4. Be sure to do a "Clean all targets" before building.