. in a pre-emptive OS there should be no freezing; given the new concurrency model that includes the use of the graphics processor GPU to do the system's non-graphics processing, my current guess is that the freezes happen when something goes wrong in the GPU, and the CPU is just waiting forever . . the CPU needs to have some way of getting control back, and sending an exception message to any of the processes that were affected by the hung-up GPU . . could any of Apple's developers correct this theory or comment on it ? _______________________________________________
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