Mack maintains a strong science outreach presence on both social and traditional media. She has been described by Motherboard and Creative Cultivate as a "social media celebrity". Mack is a popular science writer and has contributed to The Guardian, Scientific American, Slate, The Conversation, Sky & Telescope, Gizmodo, Time, and Cosmos, as well as providing expert information to the BBC. Mack's Twitter account has over 300,000 followers; her response to a climate change denier on that platform gained mainstream coverage, as did her "Chirp for LIGO" upon the first detection of gravitational waves. She was the 2017 Australian Institute of Physics Women in Physics lecturer, in which capacity she spent three weeks delivering talks at schools and universities across Australia.