Thanks.  I will address these issues before final. 

None of this is new -- we've gone through 5 release candidates over many weeks.  Why is this just coming to light now?


On 07/23/2013 11:16 PM, Michiel de Hoon wrote:
I noticed that this release candidate will always skip the Mac OS X backend,
as the .check() method of BackendMacOSX in returns None. Adding
    return "darwin"
or some other string solves the issue.
Also, if I am not mistaken, the files under lib/matplotlib/backends/Matplotlib.nib (as returned by the get_package_data() method of BackendMacOSX in are needed by the cocoaagg backend, not by the MacOSX backend.