OpenAI shipped an Apple Messages plug-in for the ChatGPT desktop app on August 20, 2026. It reads iMessage, SMS, and RCS conversations on a Mac, drafts replies, searches message history, and can send on your behalf. It runs locally on the device and requires Full Disk Access. It is available across subscription tiers and works alongside Codex and ChatGPT Work.
What this enables
The practical use for anyone running a small studio is client triage. A week of scattered SMS and iMessage threads becomes something you can query: which client asked for a revision, which invoice conversation never got a reply, what did you promise on the phone last Tuesday. Searching message history for commitments is the job this does well, and it is one most people currently do by scrolling. OpenAI's plug-in documentation covers what the connector can and cannot reach.
Drafting is the weaker half. ChatGPT can generate a follow-up suggestion from a received message, but OpenAI explicitly discourages granting persistent send approval, which means each outbound message still needs a click. Treat it as a drafting assistant, not an autoresponder.
Why it matters
The plug-in ships inside the ChatGPT desktop app rather than as a separate install. It is a local-first integration rather than a cloud sync, which is the detail that makes it usable for client work. OpenAI states conversations are stored by default on the user's computer and that content stays local unless you save it to cloud storage. It does not build a full index of your messages, and access requires a specific request rather than running continuously in the background.
That design still means granting Full Disk Access to a chat application, which is a meaningful permission. If your Mac holds work covered by a client NDA, read the plug-in documentation before enabling it rather than after.
Key details
Launch date: August 20, 2026.
Platform: ChatGPT desktop app on macOS.
Message types: iMessage, SMS, and RCS.
Permission required: Full Disk Access.
Availability: across ChatGPT subscription tiers, including Codex and ChatGPT Work usage.
Capabilities: sort, analyse, edit, search, draft, send, and delete messages.
What to do next
Update the desktop app and enable the plug-in on a machine that does not hold sensitive client material first. Run one concrete query against your own history, something like finding every unanswered thread from the last fortnight, before deciding whether the permission trade is worth it. This follows the same desktop expansion we covered when ChatGPT gained computer history on Mac.
