Better software for DSD

http://www.aesthetix.net/digital.php

Your DAC doesn't support DSD natively

You need to set Audirvana Plus to convert DSD to PCM.

I take it you have A+ and not the free Audirvana - which I recall does not handle DSD in any form.

Audirvana Plus/Preferences
Audio System tab
Under DSD Detection, set to None: Convert to PCM

Select Max Sample Rate to 192kHz - the maximum your DAC can handle.

See if that helps.

How are you playing the DSD files?

As an ISO loaded into Audirvana Plus' playlist window?

If you are adding DSF to iTunes using a shortcut type method which makes the DSF file appear as an M4A, A+ has changed their alias method. In the older versions, it would play the same shortcuts created by Pure Music (.M4A) but this was changed to a new method in later versions. I gather this was because Pure Music sought an injunction and forced them to change the method. Shame really, I was using PM to make the DSF alias M4A files and using A+ to play them for the longest time.

Most DACs only support DOP on the USB input so it won't work over SPDIF. I think the PS Audio DS DAC might be one of the few to allow it.

I actually am not a fan of Pure Music anymore. Not when they charged 50 bucks for a bug fix to v2.0

A+ is still my preferred player. I am curious tho you always mention Audirvana. You do have Audirvana PLUS right?

DOP is DSD over PCM :)

You can have a free trial demo of JRiver. See if that works for you.

I have never had any issues with DOP on any of my DACs which support DSD over PCM on USB on A+

You aren't going through an external USB-SPDIF converter, right?

There's JRiver for Mac. It's 50 bucks. The remote app is not free tho

Control playlist without using the keyboard and mouse. Also streams music from JRiver to iPad.