{"slug": "i-built-a-local-ai-writing-assistant-for-mac-text-fields", "title": "I built a local AI writing assistant for Mac text fields", "summary": "A developer built DraftKey, a native Mac app that runs on-device AI for autocomplete and rewriting directly inside compatible macOS text fields, aiming to eliminate the copy-paste workflow of cloud chat tools. The app relies on macOS Accessibility APIs, requires macOS 14+ and Apple Silicon, and keeps writing assistance local while using the internet only for license activation, updates, and the initial model download. The developer acknowledges that support varies by text field and that secure fields are left untouched.", "body_md": "Most AI writing tools have the same hidden tax.\n\nYou stop writing, copy the text, open a chat window, paste it, explain what you want, copy the answer, then paste it back into the app where you were originally working.\n\nThat is fine for a big draft. It is annoying for the tiny moments that happen all day:\n\nI wanted that help inside the Mac text field I was already using.\n\nSo I built DraftKey, a native Mac app for private, on-device AI autocomplete and rewriting in compatible macOS text fields: [https://www.getdraftkey.com/](https://www.getdraftkey.com/)\n\nThe problem is context switching.\n\nWhen I am writing an email, I do not want to move the draft into another app unless I really need a full conversation. Most of the time I already know what I mean. I just want the wording to get cleaner, shorter, warmer, or more direct.\n\nAutocomplete is similar. If I am halfway through a sentence, opening a separate AI chat breaks the flow more than it helps.\n\nThe ideal version feels closer to spellcheck than chat. It appears where I type, helps when useful, and gets out of the way when I keep writing.\n\nA lot of everyday writing is private by default.\n\nClient emails, internal notes, half-formed thoughts, personal messages, support replies, strategy notes, and rough drafts are not always things people want to paste into a cloud tool.\n\nCloud AI is powerful, and I still think it is useful. But writing assistance has a different privacy expectation when it is watching the text field you are actively editing.\n\nDraftKey runs the writing model on the Mac for autocomplete and rewriting. The setup still needs the internet for things like license activation, app updates, and the initial model download, but the writing help itself is designed around local inference.\n\nThat is the tradeoff I wanted: less cloud dependency for the small writing improvements that happen constantly.\n\nThe honest limitation is that this kind of app depends on macOS Accessibility.\n\nSome text fields expose enough information for a helper app to read the relevant text, show a suggestion, and apply a rewrite. Some do not. Secure fields should not be touched. Some custom editors use their own text systems and can behave differently.\n\nSo the right promise is not “works everywhere.” That would be dishonest.\n\nThe right promise is closer to: works inside compatible macOS text fields, with clear limits, while keeping the user in control.\n\nThat is less flashy, but it is the reality of building a native Mac utility instead of a web editor.\n\nFor small writing tasks, I think the best UX is:\n\nThe important part is review. I do not want an AI tool silently replacing my writing. I want a fast second pass that I can accept, ignore, or edit.\n\nThat makes the tool useful without making it feel like it owns the draft.\n\nDraftKey also includes mechanical keyboard typing sounds.\n\nThat is not the productivity thesis. It is just fun. Some people like typing sounds. Some people hate them. I wanted it optional and separate from the AI features.\n\nThe serious part is local autocomplete and rewriting. The keyboard sounds are there because writing tools are allowed to feel good too.\n\nDraftKey is for Mac users who write a lot and do not want every small edit to become a trip through a browser tab.\n\nThe best fit is probably:\n\nIt requires macOS 14+, Apple Silicon, and enough memory for local AI features. There is also an initial model download.\n\nIf your main need is a full chat assistant, use a full chat assistant. DraftKey is meant for the smaller, more frequent job: helping with the text already in front of you.\n\nThat is the workflow I wanted on my Mac, so I built it.", "url": "https://wpnews.pro/news/i-built-a-local-ai-writing-assistant-for-mac-text-fields", "canonical_source": "https://dev.to/godnick/i-built-a-local-ai-writing-assistant-for-mac-text-fields-18d7", "published_at": "2026-09-23 15:15:12+00:00", "updated_at": "2026-09-23 15:29:00.794282+00:00", "lang": "en", "topics": ["ai-tools", "ai-products", "large-language-models", "generative-ai"], "entities": ["DraftKey", "Apple", "macOS"], "alternates": {"html": "https://wpnews.pro/news/i-built-a-local-ai-writing-assistant-for-mac-text-fields", "markdown": "https://wpnews.pro/news/i-built-a-local-ai-writing-assistant-for-mac-text-fields.md", "text": "https://wpnews.pro/news/i-built-a-local-ai-writing-assistant-for-mac-text-fields.txt", "jsonld": "https://wpnews.pro/news/i-built-a-local-ai-writing-assistant-for-mac-text-fields.jsonld"}}