Question marked as Top-ranking reply User profile for user: Niel Niel Community+ 2025 User level: Level 10 736,223 points May 5, 2021 10:27 AM in response to Mikal215 Back up your data, check your applications for compatibility, and click on Catalina.(197488) Show more Less Upvote if this is a helpful reply Downvote if this reply isn’t helpful Reply Link