SDS Drop for Mac is a better way to get samples into your Rytm.

Drag & Drop your samples directly to the pads, and that's it.
It's twice as fast as c6.
View on App Store

current version: 1.0.3

non-obvious features:
- Works with non-audio files, produces all kinds of noise. definitely try this, and experiment with different file types!
- Interface colors can be tweaked. Check out the Preferences (CMD+,)
- There are options for transforming the sample name, also in Preferences.

limitations:
currently only supports one sample transfer at a time.

known issues:
Preferences are wonky on Mavericks

follow on Twitter: https://twitter.com/sdsdrop

Support Page

Also check out the thread on Elektronauts.com forum:

http://www.elektronauts.com/topics/view/18371

This video shows an xfer of a single sample to the Elektron Analog RYTM