Opening Xcode on Mac
Here are some things to try
+ Try double clicking
+ Also you might be right-clicking on the mouse - try left-clicking.
+ If no luck, go to Mac HD -&gt; Applications, then click once on the Xcode icon and choose Command-O or Choose Open from the File menu (top left of screen).
+ Failing this - go to Mac HD -&gt; Applications -&gt; Utilities and open Terminal. Then run

open /Applications/XCode.app


If all these fail - post back the response from Terminal.

Also - please post your OS version, and the version of Xcode (click on XCode once and then type Command-I or choose Get Info from the File menu). The version number will be listed in the General section of the pop-up window.

Do you know how XCode was installed (e.g via AppStore or was it installed a download file)?