LegacyAI is a tool that allows older Apple computers to interact with OpenAI's ChatGPT. It supports 15 different Mac systems, ranging from System 7 to 10.11 (El Capitan). You can also configure a proxy server for a completely customizable experience. LegacyAI allows Macintosh computers released from 1988 onward to communicate with ChatGPT before the official app was released for iOS. LegacyAI is a powerful tool for anyone who wants to use an AI-powered personal assistant on their older Macintosh computers.