developer.apple.com">

Pro Audio Support

Q:
After updating to Mac OS X 10.4.10, some FireWire audio interfaces may have no sound output. How can I fix this?
 
A:
To resolve this issue, install the FireWire SDK 24 for Mac OS X from developer.apple.com
Note: This download requires an Apple Developers Connection (ADC) account. If you are not an ADC member, you can create an account at no charge.