Update docs for macOS with Homebrew

What does this MR do?

This MR updates docs for installation to macOS with Homebrew.

Why was this MR needed?

Docs are obsolete.

Are there points in the code the reviewer needs to double check?

Does this MR meet the acceptance criteria?

• Documentation created/updated
• Tests
  • [n/a] Added for this feature/bug
  • [n/a] All builds are passing
• Branch has no merge conflicts with master (if you do - rebase it please)

What are the relevant issue numbers?

Closes #1212