Sidekick is an AI tool that brings ChatGPT to macOS users. Similar to Spotlight, Sidekick allows users to access conversational AI quickly and conveniently. By downloading Sidekick, they can easily have ChatGPT available at their fingertips. Sidekick is free to use but requires an OpenAI API key. This tool was created by @augustwester and emphasizes privacy. With Sidekick, users have access to advanced language processing capabilities, enabling them to benefit from conversational AI in various applications.