Are RAW images from Samsung NX300 not processed by Aperture?

No, they are not (yet) supported, sorry.

See the list of currently supported raw format here:

Apple - Aperture - Technical Specifications - RAW Support

Try to develope the raw with the software that came with your camera, or use the free Adobe DNG Converter to convert the raw files.

Another option would be to import raw+jpeg while you are waiting for the raw support to be released, and to use the jpeg as master. You can change that later and switch to the raw as original image file.

Regards

Léonie

I waited for support of NX 20 Raw for months - and now it's about a year since I bought the camera. Aperture is collecting dust as I switched to Lightroom which has support for the complete Samsung family, already including the NX 300.

Apparently Apple vents their war with Samsung on their users now. I'm just lucky that my blu-ray player/writer from Samsung (still?) works with my iMac ...