... important goal of the discussion is to better understand the reasons, and if possible, the rationale behind Mac OS X and its important components. This, in turn, will be helpful in understanding and appreciating the system as it is today. My approach in this discussion is to have somewhat high magnitudes of the depth and breadth of historical coverage, as long as I believe the discussion is interesting and relevant from a system design perspective, within reason. For example, while I will briefly describe "the influence of Xerox PARC" and the background of Mach, I will not go to farcical limits and talk about the invention of the transistor, or the discovery of Silicon. Feedback I will welcome, and do request constructive feedback. I will highly appreciate if any errors, omissions, or misrepresentations are pointed out to me. I thank all those who have taken time to send me feedback in ...

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