Following an announcement on December 20, 1996, on February 4, 1997, Apple Computer acquired NeXT for $ 429 million, and used the OPENSTEP for Mach operating system as the basis for OS X.

Following an announcement on December 20, 1996, on February 4, 1997, Apple Computer acquired NeXT for $ 427 million, and used OPENSTEP as the basis for OS X. Traces of the NeXT software heritage can still be seen in OS X.

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