Xcode is written Xcode, not xCode. Thank you and good night.
ps. if you have any friends who work in Apple retail, twice a year or so they have a big clear out of some of the internal use machines. You can pick up fairly good machines for very very cheap. They had 2009 white MacBooks for 170 bucks or so the last time.
The cheapest official retail option is the Mac Mini for $499. It's not a laptop but it will run the latest Xcode. Might be just the thing you need for that first app that makes you a bazillionaire.
This is a great tip. My main laptop is a 2009 white MacBook with an SSD I cannibalised from another old laptop. The only thing I miss is Civilization V, everything else is fine.
