Garageband can't record my mixer. Please Help!!!

I have tried going to preferences and choosing built in output and system settings for output and the controller for the input ...

In the System prefs or in GB's prefs?

I'm having the same problem with the Xenyx x1204 I got for Christmas. It works fine in EnergyXT2 the free software from Behringer after adjusting the input settings. The mixer is supposed to be plug and play and does not require Mac drivers and subsequently there are none on their website.

It should appear as something like audio codec for the input if its recognised. You need to change the input in System Preferences sound and Garageband Preferences and make sure when you add a vocal instrument track you click the question mark below and make sure the input is also showing audio codec. So far I have found that even with these correctly entered Garageband does not pick it up usually.

A work around which sometimes gets it to recognise is setting up the mixer in EnergyXT2 first then opening Garageband and in Garageband then go to Preferences and change the input to one you do not want and then back to audio codec it then gives a message like updating sound card or something (I can't remember) and theres a short wait then theres a chance it should work.

Just another little thing worth mentioning, if you are using a phantom mic with your mixer it might be that the gain needs to be quite high also. Seems to be something with Behringer Xenyx USB mixers needing to be set higher than usual.

...not a big fan of behringer...