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Full Discussion: Macos is the UNIX?
Top Forums UNIX for Beginners Questions & Answers Macos is the UNIX? Post 303040007 by Corona688 on Monday 21st of October 2019 04:33:00 PM
Old 10-21-2019
In the literal, legal sense, UNIX means you had your operating system tested and certified as UNIX-compliant. Apple did this, and Linux hasn't (and perhaps can't, except for a tiny subset of configurations and features.)

In the same sense, Windows NT was partly compliant back in the day. They hastily added enough bolt-on modules and compatibility software it was compliant for a few narrow cases.
 

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