Enable Cut in Finder in OSX 10.7 (Lion)
As @RobZolkos said in his answer:


  It's not part of the Apple system to 'cut' files. The option is there
  and becomes enabled when text is selected. But not files. [...]
  
  &#x2318;+C then &#x2325;+&#x2318;+V does the cut-and-paste for files
  on OS X.