Updated README to list macOS as supported platform.

[s8ngyu]

Context

• Update README to list macOS as supported platform.

Choices

• Changed README for English and Korean, still requires Chinese translation but I don't know any single Chines characters.

Checklist before requesting a review

• [X] I have performed a self-review of my code
• [X] I've added documentation about this change to the README.
• [X] I've not introduced breaking changes.

[thijsvanloef]

Will merge as soon as i've created a new release, currently only the :dev image supports macOS