RuneLite

About

RuneLite is a free, open-source, super fast client for Old School RuneScape. The site offers downloads for macOS on both Intel and Apple silicon, along with Windows and Linux.

RuneLite can use your GPU to render the game, which the site says provides better FPS, increased draw distance, enhanced scaling, and anti-aliasing. It also includes a Loot Tracker that shows kill count and drops, with prices, from monsters you kill, and Status widgets that show boost timers, enemy HP, and other useful overlays.

RuneLite integrates with Discord's Rich Presence to display what you're doing in the game, and it allows you to form in-game parties.