PaletteBrain is an AI-powered tool designed for macOS that integrates ChatGPT functionalities directly into Mac applications. With PaletteBrain, users can enhance productivity by accessing the capabilities of ChatGPT with simple shortcuts, eliminating the need for constant window-switching and manual text copying. The tool is built to streamline workflows, allowing users to perform tasks like grammar correction, text summarization, and code refactoring seamlessly within their favorite Mac applications.