There doesn’t seem to be a proper way to upgrade from XCode 3 to XCode 4, so the best way to do this is to completely uninstall XCode 3.

I found that the best way to do this is by running the following command from a Terminal Window

sudo /Developer/Library/uninstall-developer-folder

 

Edwin is the founder and editor of Little Handy Tips and Wollongong Fitness. He is also the developer for the Google Custom Search WordPress plugin and Custom About Author WordPress plugin. Find out more about him here.