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Apple Goes With Mach Kernel

A memo from Ellen Hancock and Avie Tevanian of Apple to Mac developers.

Received on Fri, Jan 31, 1997 at 6:02:04 PM.

Dear Developers,

As you know, we recently announced our intention to acquire NeXT Software, Inc. and deliver a new operating system based on NeXT and Apple technology code-named Rhapsody. At Macworld San Francisco, we shared our high level strategy and goals for this operating system. We want to share as much information as possible when important decisions have been reached.

At Macworld, we indicated that Rhapsody will be based on a robust operating system foundation that features full preemptive multitasking, memory protection and SMP and we committed to announce our choice for the core OS within a month.

We have chosen to deliver these capabilities using the Mach kernel. Apple completed a thorough evaluation of several options. Each of the options had both technical and business strengths. Mach represents the best balance of technology, business fit and maximizes our ability to deliver on our stated goals for Rhapsody. We believe the Mach-based core provides Apple and developers a compelling technology foundation in which to build innovative and world class products.

Clearly, there are further technical decisions still to be made. We will continue to update you on a continuing basis.

Ellen Hancock
Chief Technology Officer

Avie Tevanian
Vice President, NeXT Software, Inc.

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