# What MarsDawn doesn't do.

Some things are left out on purpose. If you need one of them, it's better to know now than after you buy.

![MarsDawn in dark mode, with Markdown source on the left and the rendered page on the right.](https://marsdawn.southern-light.dev/assets/screens/03-dark-1180.png)

In this screenshot:

1. One document per window, on this Mac.
2. You write Markdown here.
3. The toolbar holds themes and layouts, and there is no plugins menu.
4. The page is for reading, not editing.

## Left out

- **Sync:** MarsDawn doesn't sync your documents. They stay where you save them, so to use one on another Mac, keep it in a folder you already sync.
- **iPhone and iPad:** there is no app for them; MarsDawn is for the Mac.
- **Plugins:** MarsDawn has no plugins or extensions.
- **Sharing:** there are no accounts and no shared editing, because MarsDawn is for one person on their own Mac.
- **Editing:** you write Markdown on the left and read the page on the right; the page itself can't be edited.
- **Formats:** MarsDawn exports PDF and prints, and doesn't export Word files.
- **Themes:** it comes with Dawn, Classic, Modern and Vivid, each in light and dark, and you can't install others.
- **Other files:** plain text files and PDFs open read-only.
- **System:** MarsDawn needs macOS 26 or later.

## More

- [MarsDawn](https://marsdawn.southern-light.dev/index.md): MarsDawn is a native Markdown editor for the Mac with live preview, Mermaid diagrams and PDF export.
- [Your writing stays on your Mac](https://marsdawn.southern-light.dev/yours/index.md): MarsDawn has no account, no sync and no cloud. Your documents stay on your Mac.
- [Pay once](https://marsdawn.southern-light.dev/pay-once/index.md): MarsDawn costs USD 4.99, once. No subscription, no account, no paid tier.
- [PDF export](https://marsdawn.southern-light.dev/pdf/index.md): Export as PDF or print, with Mermaid diagrams, highlighted code and careful page breaks.
- [A Mac app](https://marsdawn.southern-light.dev/native/index.md): Native windows and tabs, autosave, version history, Quick Look, and a text editor that behaves like the rest of your Mac.
- [Support](https://marsdawn.southern-light.dev/support/index.md): Get help with MarsDawn, the Markdown editor for macOS.
- [Privacy Policy](https://marsdawn.southern-light.dev/privacy/index.md): MarsDawn does not collect personal data. Your documents and settings stay on your Mac.
- [Command Line](https://marsdawn.southern-light.dev/cli/index.md): The free marsdawn command-line tool: open Markdown files in MarsDawn, or export them to PDF from a shell or an LLM agent.
- [marsdawn for agents](https://marsdawn.southern-light.dev/cli/agents/index.md): A reference for AI agents and scripts that call marsdawn: commands, JSON output, schemas, exit codes and requirements.
- [繁體中文](https://marsdawn.southern-light.dev/zh-hant/limits/index.md): 沒有同步、沒有 iPhone 或 iPad 版、沒有外掛、不需要帳號，內建四種主題。購買前先知道。