my computer is Mac OS X Lion 10.7.2 (11C74) my problem is when i open garageband or sound forge pro softwares on i mac i can not use microphone input by using my USB audio I think the solution is about format on my USB audio... it was 24000.0 Hz 1ch 16 bit ..! and those softwares do not record by microphone input they says " Sample rate not supported. the USB AUDIO device does not support a sample rate of 44,100 Hz. Check your device's settings and capabilities. [Error code: = 8004e019] " please help how i change this format for 441000.0 Hz. With the knowledge that i had been checked on "audio MIDI setup" and there was no another format it has 24000.0 only i can not change it .