Fixyy

Select text, press a shortcut, and Apple’s on-device model fixes grammar or rewrites it. Nothing leaves this Mac.

Requires macOS 26+, Apple Silicon, and Apple Intelligence.

Install

1. Download Fixyy-*.dmg from Releases.
2. Open it. Drag Fixyy onto the Applications folder in that window.
3. Eject the disk image, then open Fixyy from Applications. It lives in the menu bar, not the Dock.
4. macOS 26 will refuse the first launch with Done / Move to Bin — click Done, not Move to Bin. Then System Settings → Privacy & Security, scroll to the bottom, Open Anyway.
5. Grant Accessibility when asked (System Settings → Privacy & Security → Accessibility).

Opening the .app from Downloads also works, but it won’t show the drag-to-Applications panel — that’s the disk image. Putting it in Applications is what you want for Login items and Accessibility.

That malware dialog is Gatekeeper. Double-click and right-click → Open no longer bypasses it. Open Anyway in Privacy & Security does. To skip the warning entirely you need an Apple Developer ID and notarization; a self-signed build cannot.

Use

• ⌘⇧G — fix grammar in place. The menu bar shows a spinner and “Fixing”, then “Fixed”. If nothing is wrong, it says “Looks good” and leaves the text alone. Undo in the app you were in (⌘Z).
• ⌘⇧R — rewrite window. Pick Shorter / Clearer / Formal / Friendly, or type your own instruction. Return rewrites; ⌘Return applies; Esc closes.
• The menu bar icon shows model status, the last job, Settings, and Quit.

Shortcuts are editable in Settings. Launch at login is there too.

Distribute

./dist.sh builds Fixyy.app and writes dist/Fixyy-<version>.dmg (drag-to-Applications) plus a zip. Put the disk image on a GitHub Release:

./setup-signing.sh    # once, so Accessibility survives rebuilds
./dist.sh
gh release create v1.0.0 dist/Fixyy-1.0.0.dmg --title "Fixyy 1.0.0"

People open the disk image, drag Fixyy onto Applications, and run it. It is not App Store software: replacing text in other apps uses synthetic ⌘C/⌘V, which the sandbox forbids.

So Gatekeeper lets it open

Self-signed builds work on your Mac. Everyone else hits “Apple cannot check it for malicious software” until you notarize.

You need an Apple Developer Program membership, a Developer ID Application certificate in Keychain, and a notarytool keychain profile:

xcrun notarytool store-credentials notarytool-profile \
  --apple-id "you@example.com" \
  --team-id "TEAMID" \
  --password "app-specific-password"

Then:

export DEVELOPER_ID="Developer ID Application: Your Name (TEAMID)"
export NOTARIZE_PROFILE="notarytool-profile"
./dist.sh

That re-signs with the hardened runtime, notarizes the disk image, staples the ticket, and rewrites dist/Fixyy-<version>.dmg.

Build from source

Xcode 16’s macOS 15 SDK does not include Foundation Models. Build with Command Line Tools and a macOS 26/27 SDK. Hotkeys are Carbon so the app still builds without SwiftUI #Preview macros.

./setup-signing.sh    # once
./build.sh
open Fixyy.app

Ad-hoc signing (codesign -s -) looks trusted in System Settings while AXIsProcessTrusted() stays false. Use ./setup-signing.sh.

export SDKROOT=/Library/Developer/CommandLineTools/SDKs/MacOSX27.sdk
swift run --build-system native fixyy-check      # no Accessibility, no live model
swift run --build-system native fixyy-fixtures   # this Mac, real model

swift test needs Xcode 26+. Xcode 16’s XCTest cannot load against CLT 27’s Testing.framework.