Elias,

I recently updated to Mac OS X Lion in the past week, and I found the OS no longer recongizes the DAC1 as a USB device. It seems like a botched driver issue with the new OS, and it is likely to get hammered out in a week or so.

Here's the details of the DAC1 when attached via USB:

Unknown:

  Product ID: 0xfffe

  Vendor ID: 0xffff

  Version: 1.00

  Speed: Up to 12 Mb/sec

  Manufacturer: Unknown

  Location ID: 0x04100000 / 4

  Current Available (mA): 500

  Current Required (mA): Unknown (Device has not been configured)

If you know anything about the state of the driver, please let us know. I'm currently using optical out, which is fine for now.

 Edited to add:

Here is the USB probe info as well:

Full Speed device @ 4 (0x04100000): .............................................   Unknown device: "Unknown"

    Port Information:   0x001a

           Not Captive

           Attached to Root Hub

           External Device

           Connected

           Enabled

    Device Descriptor   

        Descriptor Version Number:   0x0100

        Device Class:   254   (Unknown)

        Device Subclass:   1

        Device Protocol:   0

        Device MaxPacketSize:   64

        Device VendorID/ProductID:   0xFFFF/0xFFFE   (unknown vendor)

        Device Version Number:   0x0100

        Number of Configurations:   1

        Manufacturer String:   1 "Unknown"

        Product String:   2 "Unknown"

        Serial Number String:   0 (none)

    Configuration Descriptor   

        Length (and contents):   25

            Raw Descriptor (hex)    0000: 09 02 19 00 01 01 00 40  7D 09 04 00 00 00 FE 01  

            Raw Descriptor (hex)    0010: 00 03 07 21 07 00 01 40  00 

        Number of Interfaces:   1

        Configuration Value:   1

        Attributes:   0x40 (self-powered)

        MaxPower:   250 ma

        Interface #0 - Application Specific/Device Firmware Update ..............................................   "RAM"

            Alternate Setting   0

            Number of Endpoints   0

            Interface Class:   254   (Application Specific)

            Interface Subclass;   1   (Device Firmware Update)

            Interface Protocol:   0

            DFU Functional Descriptor   

                bmAttributes:   0x07 (Download, Upload, Manifestation Tolerant, Reserved bits: 0x00)

                wDetachTimeout:   256 ms

                wTransferSize:   64 bytes