Google Translate:

Hello!

I have a problem with Aperture and I happen not only to me, as I can not find anyone else who has this problem.

The problem occurs with the preview of the Effects of Aperture and White Balance.If before applying the effect in photography, correct in it the white balance, the preview of the effects is extremely slow. But if I apply white balance, the preview is normal and very fluid.

Of course, to see the best result in the preview, you need to have well-adjusted white balance, hence my problem. I would be very grateful if someone could ayduarme to solve the problem.

My computer is a iMac27 “i7 12Gb Ram.
Aperture Version 3.4.3

Thanks for your help.