I have an .obj I want to export as a .mesh to use in Ogre3D, but I can't find how to do it. I downloaded an addon to add an option for OGRE Exporter, but the final file doesn't work with Ogre. It's a .mesh.xml and I need a .mesh only. Of course renaming the file extension doesn't work.
You need to use the OgreXML converter tool. Converts the xml to binary .mesh file. Some of the exporters will convert it in the background for you if you set up the exporter correctly. You can also do this manually. See the wiki below for information about the converter.