performance issues

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Still plagued by the annoying screen flicker on your precious 27-inch iMac, even after the previous update?

Apple's new Core i7-based iMac might be a performance monster, but it looks like it's having some problems getting out of the gate: in addition to those

It's not at all clear what the root cause of the problem is, but we've noticed a big uptick in people complaining about performance issues on new 27-inch iMacs on Apple's support boards.