OpenAI's macOS App Redraws OS Integration Lines

OpenAI is escalating its platform war by embedding ChatGPT directly into the operating system layer with its new "Computer History" feature for macOS. This move reframes the AI assistant from a destination application into an ambient, context-aware utility that logs user activity across all apps to create a searchable timeline. The feature directly challenges the native OS experience controlled by Apple and Microsoft, shifting the competitive axis from standalone models to deeply integrated OS intelligence. It represents a clear escalation from Google’s recent OS-level AI integrations in ChromeOS and Android, aiming to make OpenAI the default cognitive layer for power users.