Does Apple's Design Language have a name?

Question

Google has Material Design, Microsoft has Fluent and (unofficially) Metro.

About two decades ago, the User Interface for Mac OS X was called Aqua but I do not see this term used in practice as much anymore (it does not even have a StackOverflow tag like Material Design and Microsoft-Metro have).

Is there a specific name (official or unofficial) for the design language across Apple platforms?

Answer 1

While I'm not entirely sure it's 100% analogous to Material Design, I'd say the term you're looking for is Human Interface Guidelines.

Answer 2

On this page in Apple's website you'll find the phrase "iOS design language". The macOS design language for a long time was Aqua but since Mojave, Aqua is treated like a legacy term in the SDK.