I've had issues trying to get a Chord Qute HD to settle down (huge stutter and stopping issues)
There are a lot of issues matching apps to the drivers with regard to Chord DACs.
You need the latest driver for OSX Mavericks. All on the Chord site.
Currently ( fingers crossed)I can get the Chord Qute HD to play in a stable manner; even DSD 2.8 on both Amarra 3.0.2 and Audirvana 1.5.12