D macOS Notes

This appendix is a brief guide to macOS features that differ from those of Linux. See Chapter 1 for a history of UNIX, Linux, and macOS.

The material here is based on the operating system that was called Mac OS X in 2001–2012, OS X in 2012–2016, and macOS today. This appendix will use macOS throughout. For clarity, version numbers and Mac OS are used when referring to the older, classic operating system that existed prior to 2001, which was not UNIX-based.

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