How to Use ChatGPT with Siri on Mac in macOS 27

Apple's macOS 27 Golden Gate update lets Mac owners send a single question to ChatGPT instead of the new Siri AI, but there's no switch that makes the swap permanent. Here's how to use ChatGPT with Siri on Mac: turn on the ChatGPT extension once in System Settings, then ask for ChatGPT by name every time you want it instead of Siri AI, since every new query defaults back to Siri AI otherwise (MacRumors, yesterday).

In macOS Tahoe, Siri would sometimes guess that a question needed ChatGPT and offer to forward it automatically. Siri AI in macOS 27 is smarter and does not suggest ChatGPT that way anymore, so it only hands a question over when asked directly (MacRumors, yesterday). Apple has integrated Siri AI into Spotlight, now renamed Search or Ask, across the Mac and its other devices (Apple Newsroom, earlier this month). ChatGPT sits alongside that system as something invoked on demand, not a replacement for it.

This guide covers verifying Apple Intelligence is turned on, enabling the ChatGPT extension, both ways to ask Siri to use ChatGPT for a single question, what to check if the option won't show up, and what's actually known about where your prompts end up afterward.

What you need before you start

A handful of requirements decide whether the ChatGPT extension is even reachable. Check these first:

• A Mac running macOS 27 Golden Gate with Apple Intelligence enabled, set to a supported language. Siri AI is currently rolling out as an English-language beta (Apple Newsroom, earlier this month).
• If your Mac is set to French, Japanese, Korean, Portuguese, or Spanish, hold off. Apple has scheduled those languages for October (Apple Newsroom, earlier this month).
• If you're in the EU, the Mac version of Siri AI works in a supported language. Apple's initial EU restriction applies to iPhone, iPad, and Apple Watch, not Mac (Apple Newsroom, earlier this month).
• Siri AI isn't available to anyone under 13, worth checking on a managed account before assuming the feature will appear (Apple Newsroom, earlier this month).
• Siri AI and the rest of the new Apple Intelligence features remain unavailable in China while Apple works through regulatory requirements there (Apple Newsroom, earlier this month).
• A ChatGPT account is optional. Signing in changes how requests are stored, covered further down, but it isn't required to use the extension at all.

How to verify Apple Intelligence is enabled

None of the settings below matter if Apple Intelligence itself isn't turned on. Apple's own release notes say Siri AI starts appearing only after a user turns it on in Settings, though they don't spell out the exact Mac menu path (Apple Support, earlier this month).

Open System Settings and look for an Apple Intelligence & Siri entry, or something similarly worded, since labeling may still shift during the beta. Confirm it's toggled on and that the Mac's system language matches the requirements above before moving to the ChatGPT extension steps.

If Apple Intelligence doesn't show up as an option at all, the Mac itself may not meet Apple's hardware requirements. Check Apple's official Apple Intelligence requirements documentation to confirm your specific model qualifies, since the reporting behind this guide doesn't list eligible Macs individually.

How to enable the ChatGPT extension on Mac

Turning on the extension is a one-time setup step, separate from asking ChatGPT a question later. Here's the path, as documented by MacRumors:

1. Open System Settings.
2. Click Siri in the sidebar.
3. Click ChatGPT under the "Extension" section.
4. Turn on Use Extension.
5. Choose whether to sign in with a ChatGPT account.

Turning on Use Extension doesn't make ChatGPT answer automatically; it just makes the option available for the invocation steps below. Apple describes Siri AI itself as a beta feature that's still rolling out (Apple Newsroom, earlier this month), so the wording or placement of these settings could shift before the update leaves beta.

How to use ChatGPT through Siri on Mac

With the extension turned on, there are two ways to route a single question to ChatGPT instead of Siri AI.

Method 1: Use the Search or Ask field. This one lets you see and confirm which provider you've selected before typing anything:

1. Press Command-Space to open the Search or Ask field (the renamed Spotlight search).
2. Right-click or Control-click inside the field.
3. Choose Ask, then Use ChatGPT.
4. Type the question and press Enter.

Method 2: Say or type "ask ChatGPT." Starting a request with that phrase works whether spoken to Siri out loud or typed directly into Search or Ask (MacRumors, yesterday). This method skips the menu entirely, so it suits situations where you already know you want ChatGPT rather than deciding in the moment.

Once ChatGPT answers, the field reverts to Siri AI for the next query unless you're directly following up in the same conversation (MacRumors, yesterday). That's the practical effect of Apple not building a standing default: choose ChatGPT again next time if that's what you want.

What to check if ChatGPT doesn't appear

If ChatGPT isn't showing up, work through what's actually documented rather than guessing at a single cause.

Confirm the prerequisites first. Check that the Mac runs macOS 27, Apple Intelligence is on, the system language is supported, and the account isn't restricted by age or region, using the list above. Apple's documentation covers each of these conditions for Siri AI broadly, but doesn't spell out which one specifically controls the ChatGPT extension's visibility.

Check the toggle itself. Go back to System Settings > Siri > ChatGPT and confirm Use Extension is actually switched on. iGeeksBlog lists this as the first thing to check when ChatGPT won't appear as an option, not as the statistically most common cause, but it's the fastest thing to rule out (iGeeksBlog, last month).

Watch for the language rollout. Apple currently lists Siri AI availability in English, with French, Japanese, Korean, Portuguese, and Spanish scheduled for October, so users on those other languages shouldn't expect the full workflow yet (Apple Newsroom, earlier this month). That timeline describes Siri AI generally rather than the ChatGPT extension by name, but it's a reasonable place to start if language might be the issue.

If those checks don't resolve it, a restart or a pending software update is worth trying as general troubleshooting, though neither is a documented fix in the reporting behind this guide. Apple's own Siri support documentation is the better resource for anything beyond what's covered here.

What happens to your prompts and ChatGPT history

ChatGPT is currently the only third-party option in the Ask menu. MacRumors found code inside macOS 27 referencing Claude, but Apple hasn't turned on any provider-selection feature, so treat that as unconfirmed rather than a coming option (MacRumors, yesterday).

MacRumors reports that signing in changes where requests go. Sign in with a ChatGPT account, and requests get saved to your ChatGPT chat history under OpenAI's privacy policy. Skip sign-in, and MacRumors says OpenAI receives nothing tied to your Apple Account and cannot store the request (MacRumors, yesterday). That's reported behavior from one outlet's testing, not something independently verified elsewhere in the sources behind this guide.

An earlier hands-on test complicates that picture. iGeeksBlog found that ChatGPT prompts routed through Siri didn't show up in the tester's ChatGPT account history, even after signing in with an OpenAI account (iGeeksBlog, last month). That test ran before Apple's official rollout, so it may reflect beta behavior that's since changed, but it directly conflicts with MacRumors' description of signed-in requests landing in chat history. Until one of these reports gets updated or independently confirmed, treat the sign-in and storage question as unresolved.

A separate limit applies regardless of sign-in status. Apple's release notes confirm that some server-side Apple Intelligence features, Siri AI included, carry daily usage caps, but Apple does not explain how ChatGPT-routed requests are counted (Apple Newsroom, earlier this month).

What to do next

Mac owners running macOS 27 with Apple Intelligence enabled and the system language set to English can test the ChatGPT extension today; it's a working feature, not a beta rumor. Anyone on French, Japanese, Korean, Portuguese, or Spanish should wait for Apple's October language expansion before expecting it to appear (Apple Newsroom, earlier this month).

Either way, hold off on sending anything sensitive through the extension. MacRumors and iGeeksBlog describe conflicting outcomes for where signed-in prompts end up, and that conflict hasn't been resolved. Test the extension with routine questions first, and check your own ChatGPT account history directly before trusting either report over the other for anything that matters.