As of the 3.3 update, you can no longer access Elite Dangerous products through the Mac OS. However, you can still be able to log into your account and play on PC (or via Bootcamp.)
Despite our best efforts, we have been unable to bring Horizons content to Mac due to technical barriers. With the improvements arriving in our Chapter Four update of the Beyond season, we have felt it necessary to make this difficult decision in order to allow us to bring in content and features in the way that we felt was best for the overall Elite Dangerous experience.
We hope you will understand why we have taken this course of action and would encourage those of you who have questions or concerns to please contact our Customer Support team by using the button below.