OSX Mavericks (with all current updates 17th Feb 2014) does not recognise the RW2 file from my Panasonic Lumix DMC-GH2.
Is there a patch to fix this? iPhoto did succeed in importing the associated JPEG files. Same issue with Aperture and Preview (and other tools / aperture plugins)
so presumably an underlying OS problem.
Aperture 3, OS X Mavericks (10.9.1)