Sound Output Defaults to Soundflower

Each time I boot my IMac, it seems the default sound for output is SoundFlower (2Ch). Even if I change it, it goes back to this.
Any ideas?

I have the same issue. I get great sound when I plug in external speakers but I use those at work and have for about 6 months this problem just started a couple of days ago. If anyone finds an answer please post it this is crazy.
And of course my warranty just ran out about a month ago..
Thank
Mike
Macbook Pro 13" late 2011

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