I'm interested in this as well. I have a USB-6009, and I'm trying to use NI-DAQmx Base for now because I switch between the Mac and Windows-in-a-VM environment (I'm making DAQmxBase work with the ruby language and I need to test both).
So I've installed the Mac NI-DAQmxBase package on both the Mac and the Windows sides.
And I have the DAQmxBase firmware installed on the USB-6009.
I find that when I use the VISA control panel I get timeouts on viRead (the viWrite works OK).
I test this by using viWrite to send an *IDN? request and then switch to viRead and try to read the response.
On the other hand, the Datalogger app works OK (I've tried it at 40000 S/s; at 48K it can't quite make the bandwidth).
AFAIK, I have the most recent version of NI-DAQmxBase (2.20f0), NI-VISA (4.1) and Parallels Desktop (3.0 build 4160).