Double dash long options are basically a GNU extension. BSD utilities generally don't support them. Apparently macOS does not either (since it's based off of FreeBSD)

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JdeBP an hour ago | parent [-]

macOS was based off NeXTSTEP, not FreeBSD.

And the received wisdom about long options in the BSDs is a quarter of a century out of date. When the BSDs gained a getopt_long() in their C libraries thanks to Klausner and Baron, long options quietly started appearing. This process has been gradually and quietly on-going for the whole of the 21st century.

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throw0101a an hour ago | parent [-]

> macOS was based off NextBSD, not FreeBSD.

"NextBSD" was first released in 2015:

* https://en.wikipedia.org/wiki/NextBSD

Over a decade after macOS/Mac OS X was initially released:

> macOS (previously OS X and originally Mac OS X) is a proprietary Unix[7][8] operating system, derived from OPENSTEP for Mach and FreeBSD, which has been marketed and developed by Apple since 2001.

* https://en.wikipedia.org/wiki/MacOS

> Darwin is the core Unix-like operating system of macOS, iOS, watchOS, tvOS, iPadOS, audioOS, visionOS, and bridgeOS. It previously existed as an independent open-source operating system, first released by Apple in 2000. It is composed of code derived from NeXTSTEP, FreeBSD[3] and other BSD operating systems,[7] Mach, and […]

* https://en.wikipedia.org/wiki/Darwin_(operating_system)

I remember reading release notes for FreeBSD in the '00s and seeing the exact same lines in the release notes for earlier versions of OS X.

	▲	alwillis 17 minutes ago \| parent \| next [-]
		> Darwin is the core Unix-like operating system of macOS macOS isn't "Unix-like"; it's an Open Group certified UNIX™ [1]. [1]: https://www.opengroup.org/openbrand/register/brand3725.htm
	▲	JdeBP an hour ago \| parent \| prev [-]
		Bah! Thought NeXTSTEP. Typed NextBSD. Fixed. I've been typing lots of names ending in 'BSD' today. (-: