Hi,
I've just done a clean install of Eagle 6.3.0 on OSX 10.8.2, and everything is great and all the libraries I need seem to be fine apart from xilinx_devices.lbr (from the Cadsoft download page.)
When I click in the library viewer to open the library it just hangs... in the schematic view I can open the library, then if I try to add a component it shows the items but hangs when I select one.
I know the web site suggests support for 10.8 is coming, so if this is an OSX incompatibiity then that's fine and I'll wait, but it seems more like a library processing issue.
Thanks,
Lee.