In short. Safari shows Summarize only when the website supports it and the device meets Apple Intelligence requirements.
Definition: Safari's Summarize menu is an Apple Intelligence command that generates a webpage summary from Safari's Page menu. Apple documents two sets of conditions: the website must support the menu, and the device must meet Apple Intelligence requirements.
Key facts
- Apple's Safari User Guide places Summarize in the Page menu in the Smart Search field.
- The same guide says the Summarize menu item appears only if the website supports it.
- Safari Reader has its own page condition: its button appears only when the webpage has an article that Reader can show.
- Apple's system requirements page says Apple Intelligence in macOS 27 is available on a Mac with M1 or later.
- Device and Siri languages must be set to the same supported language, and availability varies by platform, language, and region.
What can the website control?
Apple's Safari User Guide documents the menu path as follows:
Page menu > Summarize
The guide says that the Summarize menu item appears only if the website supports it. It does not name a public HTML element, metadata field, robots directive, or HTTP header for enabling that support. That leaves website support as an Apple-documented eligibility condition, rather than a web setting described in the guide.
Safari Reader supplies a separate page-level signal. The Reader button appears only if the webpage has an article that Reader can show. Reader can also show a table of contents and a summary for longer articles. A page can therefore meet Reader's article condition while the Page menu still lacks the Apple Intelligence Summarize item.
What must be true on the device?
Apple's How to get the next generation of Apple Intelligence, published 14 September 2026, says the feature becomes available on eligible devices after the 27.0 software releases, in supported languages and regions. Its device requirements include a Mac with M1 or later, and its system requirements name macOS 27 Golden Gate.
The device language and Siri language must match a supported language. Apple lists English, French, German, Japanese, Korean, and Vietnamese among the supported languages, and says that changing the Siri language can make Apple Intelligence unavailable until the new language finishes downloading and matches the device language. Apple also states that feature availability can vary by platform, language, and region.
For people based in the European Union, Apple's requirements page says that intelligent features for browsing are available with macOS 27 Golden Gate on supported Mac models. Eligibility therefore has both a page-side condition and a device-side condition.
How can a website owner check the cause?
First check the device separately from the page: confirm macOS 27 Golden Gate, a Mac with M1 or later, Apple Intelligence enabled, and matching device and Siri languages. Then open the target page in Safari and inspect the Page menu in the Smart Search field. If Summarize is absent, Apple's documentation identifies website support as the page-side condition; it does not publish a server-side switch for a site owner to inspect.
Related terms
FAQ
Can a page work in Safari Reader and still lack Summarize?
Yes. Apple gives Reader and Summarize separate conditions: Reader requires an article it can show, while Summarize appears only when the website supports it.
Does Apple document a tag that enables Summarize?
Apple's Safari guide names website support as the condition and does not identify a tag, metadata field, robots directive, or HTTP header for it.
Is a compatible Mac enough?
No. Apple also requires a supported macOS release, matching device and Siri languages, and availability for the relevant platform and region.
Sources
- Apple, "Hide distractions when reading articles in Safari on Mac", undated
- Apple, "How to get the next generation of Apple Intelligence", 14 September 2026
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