Codex for Mac adds Computer Use plugin enabling AI to control apps in the background

The event is the public adoption of Codex’s Computer Use plugin by a non-developer. The plugin allows an AI agent to operate Mac apps in the background, using its own cursor to click, type, and navigate interfaces. This is distinct from prior AI assistants that only generated text or code; Computer Use executes actions directly on the user’s machine. The material does not specify technical constraints, but the plugin’s lineage from Apple’s Shortcuts suggests it may rely on macOS accessibility APIs, which could limit its compatibility with apps that do not expose UI elements programmatically.

For engineers, the plugin introduces a new way to prototype and automate workflows without writing traditional code. The writer in the material replaced manual app-monitoring tasks with a custom Mac app built by describing requirements conversationally to Codex. This lowers the barrier to entry for non-developers but does not eliminate the need for iteration. The material notes that the writer’s first project took time to refine, and the plugin’s effectiveness depends on the user’s ability to articulate precise requirements. The cost of adoption includes the cognitive overhead of defining workflows and the potential risk of granting an AI agent control over sensitive apps.

The material highlights a trust dynamic that may influence broader adoption. The plugin’s creators, including former Apple Shortcuts engineers, provided a sense of continuity for early users. However, the material does not address how the plugin handles errors, security, or data privacy, which could be critical for engineers considering its use in professional environments. The writer’s experience suggests that the plugin is most valuable for highly personalized workflows, such as custom column widths or app-specific automations, rather than general-purpose tools. This niche focus may limit its appeal to users who do not have repetitive or idiosyncratic tasks to automate.

The material frames Codex’s Computer Use as a progression from ChatGPT, where the latter initially felt more accessible. The writer’s shift from viewing Codex as intimidating to considering ChatGPT without it a “toy” underscores the plugin’s potential to redefine user expectations. However, the material does not provide data on performance, scalability, or integration with existing development tools. For engineers, the plugin’s value may lie in its ability to bridge the gap between no-code tools and full-fledged development, but its long-term utility will depend on how well it handles edge cases and complex workflows. The material’s focus on a single user’s experience limits generalizations about its broader applicability.