docs: replace "Mac OS X" -> "macOS" (GH-27364) (GH-27374)

"Mac OS X" has been rebranded as macOS

https://www.apple.com/macos
(cherry picked from commit 5fdd2a14ce3f81a7db47bb79421c426dec4b25bd)

Co-authored-by: partev <petrosyan@gmail.com>

Miss Islington (bot) committed 4y ago

3dc88ff845091ea6a8e2e559e13cb0294b088e39

Parent: 5151826

Committed by GitHub <noreply@github.com> on 7/26/2021, 8:22:26 PM