New iMacs change screens, mice

Apple Inc. has updated its iMac desktop computer line and introduced a mouse that responds to the touch of fingers instead of using buttons or scroll wheels.

Those were among the finishing touches on a holiday lineup Apple hopes will help maintain the momentum of the past several quarters, in which the company has grown stronger despite the recession.

The updated iMacs have bigger screens -- 21.5 inches and 27 inches, compared with existing models' 20 inches and 24 inches. They also have speedier processors and better graphics. The least expensive model costs $1,199, the same as the past generation, but the top-of-the-line iMac is now $200 cheaper at $1,999.

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