November 14, 2007–Wolfram Research has verified that Mathematica 6 is completely compatible with Mac OS X Leopard. Wolfram developers and testers have been working with Apple and testing prerelease versions of Leopard for months to ensure that the transition would go smoothly. Now that the final version of Leopard has been released, Wolfram Research has confirmed that Mathematica passes the most comprehensive tests when run under Mac OS X Leopard.