Connect Macbook Pro to DacMagic DAC


What is the best cable option to comnect my Apple Macbook Pro to my DacMagic DAC? The usb cable provided by Cambridge works okay but can't I get better sound using a mini-rca from the Mac's headphone jack and running it into the DAC's Toslink input? Or, is there such a thing as a mini-rca to coaxial spdif cable? What is the best cable you've ever used for this application?
stickman451
Toslink to mini-toslink, glass fiber, steel jacketing for protection, scroll to the middle of the webpage:
http://www.lifatec.com/toslink2.html
Van Den Hul also makes some great glass optical cables.
http://www.vandenhul.com/p_B42.aspx
"can't I get better sound using a mini-rca from the Mac's headphone jack and running it into the DAC's Toslink input?"

yes you will most likely get better sound.
Update:
Got myself a mini-stereo to Toslink cable and connected it to the headphone jack of my Macbook Pro.  Downloaded several 24/96 albums off of HDTracks.com including 'Hotel 'California' and 'Paper Airplane'.  Now we are talking!!!  So far I have downloaded two players on the Mac that will play FLAC files; Pure Music and Decibel.

Both play the FLAC files at 24/96 and both sound great.  Overall I like the Decibel software the best.  It's has a simpler interface, doesn't require iTunes, and I think that it sounds better.  And, it only costs $33.  Pure Music is a bit more expensive at $129... According to the Decibel website the developer is working on upgrading the player to include playlists and other organizational  features.
I've been very happy with my Wireworld Supernova 6-mini. I use it to connect my Macbook Pro, running Pure Music Software, to a Bryston BDA-1 DAC.