IntelliBar is a macOS application that serves as an AI-powered assistant, leveraging ChatGPT to simplify various everyday tasks. Users can ask questions or perform tasks directly from their Mac, interacting with applications like Mail without interrupting their workflow. It's designed to boost productivity by providing swift access to information and allowing efficient task execution. Features include text summarization, task automation, and a user-friendly interface, making it an essential tool for enhancing productivity on Mac.