# Apple Intelligence Markify uses Apple Intelligence on your Mac: the system **Writing Tools** and Apple's on-device language model. Your text isn't sent to a server, and every change waits for you to keep it. > [!NOTE] > Apple Intelligence needs a Mac with Apple silicon and Apple Intelligence turned on in **System Settings › Apple Intelligence & Siri**. On other Macs, Markify works the same without these features. If the model is still downloading, Markify says “Preparing on-device model…”. On **macOS 15.6 Sequoia**, the format bar and whole-document menu offer system **Proofread** and **Rewrite**. These open Writing Tools. Custom prompts, tone shortcuts, generation at the caret, title and tag suggestions, and Links panel summaries require **macOS 26 or later**, which provides the Foundation Models framework. ## Working on a selection Select text and click the Apple Intelligence symbol at the left of the format bar, or press **⇧⌘W**: - **Describe your change** in your own words and press Return. - **Proofread** and **Rewrite** open the system Writing Tools. - **Friendly**, **Professional** and **Concise** rewrite the selection in that tone. - **Summary**, **Key Points**, **List** and **Table** turn the selection into that form. ## Working on the whole document Click the Apple Intelligence symbol at the top right of the window to: - describe a change to the whole document, - proofread or rewrite it, - **Summarize** it in a paragraph at the top, - add a **Key points** section, - **Suggest title & tags**, which fills in the frontmatter, - **Continue writing** at the caret. ## Generating at the caret On an empty line, press **⌘↩** (or type `/write`) to have Apple Intelligence continue from what you've written. The text streams in dimmed; press **⌘↩** again to keep it, or Escape to discard it. Choose the tone and whether the surrounding section is used as context in **Settings › Intelligence**. ## Reviewing changes Rewritten text appears inside a multicolor edge. **Compare** it with the original, **Try Again**, **Discard Rewrite**, or **Accept** it. ⌘Z undoes an accepted change. In OKF concepts, **Settings › Intelligence › Record AI edits in OKF concepts** also covers system Writing Tools. When its session ends with changes to the concept's body, Markify records Apple Intelligence as the producer. Discarding all changes leaves attribution unchanged.