AI Proofreading on Mac: Fix Grammar in Any App Without a Browser Extension (2026)

Your Mac Has a Proofreading Problem

You write in dozens of apps every day. Emails in Apple Mail or Gmail. Messages in Slack and Teams. Notes in Notion or Obsidian. Documents in Pages or Google Docs. Quick replies in WhatsApp. Commit messages in your terminal. Feedback in Jira or Linear.

Every one of those apps is a place where a typo, a grammar mistake, or an awkwardly worded sentence can make you look careless. And yet, most proofreading tools only cover a fraction of those apps.

Grammarly works great in Chrome. But open Apple Mail, and it is not there. Open Slack's desktop app, and coverage is spotty. Open VS Code, Terminal, or Bear, and you are on your own.

This is the Mac proofreading gap: the tools that catch your mistakes only work where they were designed to work, not where you actually write.

The Mac Proofreading Landscape in 2026

The options break down into three categories.

Browser Extensions

Grammarly remains the most popular choice. The browser extension covers Chrome, Safari, Firefox, and Edge. On macOS, the desktop app adds an overlay for some native apps, but support varies. Professional tools, creative writing apps, and many macOS-native applications are not covered.

LanguageTool offers an open-source grammar checker with browser extensions and a macOS desktop app for Apple Mail. Supports 30+ languages. Free tier is generous; Premium is $4.99/month.

QuillBot provides grammar checking, paraphrasing, and summarization. The macOS app integrates with some native apps. Free tier available; Premium is $9.95/month.

These are solid tools — inside the apps they support. The limitation is always reach.

Apple Intelligence Writing Tools

macOS Sequoia introduced built-in Writing Tools powered by Apple Intelligence. Select text in a supported app, right-click, and choose "Proofread" from the Writing Tools menu.

The advantage is that it works in most Apple-native apps — Mail, Messages, Notes, Pages, Safari — and some third-party apps that adopt the API.

The limitations: it requires Apple Silicon (M1 or newer), macOS Sequoia or later, and the proofreading is limited to grammar and spelling corrections. No tone adjustment, no rewriting, no translation. And coverage in third-party apps depends on whether the developer has integrated the Apple Intelligence API.

System-Wide Native Apps

These are macOS apps that work in every application through the accessibility API — the same system-level access that powers VoiceOver and other macOS features.

Stanza — offline-first grammar checker using local AI models. Very private, very affordable ($14.99 lifetime). Focused purely on grammar and style; no AI generation, no dictation, no translation. Requires Apple Silicon.

FixKey AI — grammar correction, voice dictation, translation, and custom prompts. Works across all Mac apps. $48/year.

RewriteBar — grammar, tone, translation, and custom actions with 500+ AI model support via BYOK. $29 one-time.

WordWand — grammar correction, tone adjustment, AI writing, translation (40+ languages), voice dictation, text-to-speech, task extraction, and custom prompts. Works in every Mac app. Free tier (5,000 words/month), Pro at $10.99/month.

System-wide apps solve the coverage problem entirely. If you can select text in an app, the proofreader can fix it.

Why System-Wide Matters

Consider a typical 30-minute stretch of your workday:

You reply to an email in Apple Mail — needs grammar check
You update a task in Linear — quick description, should be clean
You post in a Slack channel — typo would be visible to 40 people
You write a comment in Figma — design feedback should be clear
You update a Notion doc — documentation needs proper grammar
You reply to a WhatsApp message — client communication

A browser extension covers maybe one or two of those. Apple Intelligence covers Apple Mail and possibly Notion. A system-wide tool covers all six.

The value of proofreading is not in catching one mistake. It is in consistently catching every mistake, everywhere, without you having to think about whether the tool works in this particular app.

How AI Proofreading Differs from Spell Check

Your Mac already has spell check built into every text field. Red squiggly lines appear under misspelled words. This has been there for decades.

AI proofreading goes significantly further:

Issue	Spell Check	AI Proofreading
Misspelled words	Yes	Yes
Grammar errors (subject-verb agreement)	No	Yes
Punctuation errors	No	Yes
Run-on sentences	No	Yes
Awkward phrasing	No	Yes
Wrong word choice (their/there/they're)	Sometimes	Yes
Tone issues	No	Yes (with tone adjustment)
Style inconsistencies	No	Yes
Non-native speaker patterns	No	Yes

Spell check tells you a word is wrong. AI proofreading tells you a sentence is wrong — and fixes it.

How WordWand Handles Proofreading

WordWand's grammar feature works in three steps:

Select text in any Mac app
Press your keyboard shortcut
Choose grammar correction — the text is fixed and replaced inline

No copy-pasting. No browser extension. No separate window. The corrected text appears exactly where the original was.

What It Catches

WordWand's AI proofreader handles:

Spelling errors — including context-sensitive corrections (e.g., "their" vs "there" based on sentence meaning)
Grammar mistakes — subject-verb agreement, tense consistency, article usage
Punctuation — missing commas, semicolons, period placement, apostrophes
Run-on sentences — splits them into clear, readable units
Awkward phrasing — restructures sentences that are grammatically correct but hard to read
Non-native speaker patterns — catches the specific issues that ESL writers tend to make: wrong prepositions, unnatural word order, overly literal translations from the native language

Beyond Proofreading

The difference between WordWand and a dedicated grammar checker is what happens after you fix the grammar. With the same shortcut, in the same app, you can:

Adjust tone — make corrected text more professional, casual, friendly, or direct
Translate — translate the proofread text into 40+ languages
Rewrite with AI — go beyond grammar correction and have the AI rewrite the passage entirely for clarity
Dictate — speak your text, then proofread and polish the transcription
Listen to it — have the corrected text read back to you, which is one of the best ways to catch issues your eyes missed

Proofreading is the entry point. The full writing toolkit is available behind the same shortcut.

Proofreading for Non-Native English Speakers

If English is not your first language, AI proofreading is not just about catching typos. It is about sounding natural.

Non-native speakers typically make patterns of errors that are invisible to basic spell check:

Wrong prepositions: "interested on" instead of "interested in"
Article misuse: "I need the information" when "I need information" is correct
Direct translations: phrasing that is grammatically correct but sounds unnatural because it follows the logic of another language
Overly formal tone: using complex structures when simple ones sound more natural in English
False friends: words that look similar to words in your language but mean something different

AI proofreaders catch these patterns because they understand context, not just rules. WordWand is particularly useful here because you can proofread and then immediately translate or adjust tone in the same workflow — useful when you are communicating across languages.

For a deeper guide, see our AI writing guide for non-native speakers.

Comparison: Mac Proofreading Options in 2026

Feature	Grammarly	LanguageTool	Apple Intelligence	Stanza	WordWand
Works in every Mac app	No	No	Partial	Yes	Yes
Works in browsers	Yes	Yes	Safari only	Yes	Yes
Works in Apple Mail	Limited	Yes (desktop app)	Yes	Yes	Yes
Works in Slack (desktop)	Limited	No	No	Yes	Yes
Works in VS Code	No	No	No	Yes	Yes
Offline processing	No	Partial	Yes	Yes	No
Tone adjustment	Yes	No	Yes (basic)	No	Yes
AI text generation	Yes	No	Yes (basic)	No	Yes
Translation	19 languages	30+ languages	No	No	40+ languages
Voice dictation	No	No	No	No	Yes
Text-to-speech	No	No	No	No	Yes
Free tier	Limited features	20K chars/check	Free (Apple Silicon)	7-day trial	5,000 words/mo
Pro price	$12/mo	$4.99/mo	Free	$14.99 lifetime	$10.99/mo

The Read-Aloud Proofreading Trick

Professional editors know this: reading text aloud catches mistakes your eyes miss. When you read silently, your brain autocorrects errors. When you hear text spoken, errors become obvious — awkward phrasing jumps out, missing words become apparent, and run-on sentences feel physically long.

WordWand's text-to-speech lets you select any text and hear it read aloud with natural voices. The proofreading workflow becomes:

Write your text
Run grammar correction with WordWand
Listen to the corrected text with text-to-speech
Catch any remaining issues by ear
Fix them

This is not a feature any other proofreading tool on Mac offers. Podcast mode takes it further — hear your text as a two-person discussion, which makes reviewing longer documents more engaging.

Getting Started

WordWand is a native macOS app. Download it from wordwand.co, grant Accessibility permissions, and set your keyboard shortcut.

From that point forward, every app on your Mac has a proofreader. Apple Mail, Slack, Notion, VS Code, Pages, WhatsApp, Figma, Linear, Terminal — anywhere you can select text.

The free tier gives you 5,000 words per month with full access to grammar correction and all other features. That is roughly 100+ proofreading corrections per month — enough to cover your daily writing and see how system-wide proofreading changes your workflow.

No browser extension. No app-by-app setup. One shortcut, every app, every time.