Requirements
- macOS 15 (Sequoia) or later, Apple silicon or Intel.
- An App Store account to install it. Mariner itself never asks you to sign in.
Install
- Get Mariner from the Mac App Store and open it.
- Mariner creates a workspace named Personal with a sample collection so there is something to send right away — see Your first request.
That is the whole setup. There is no account to create.
The free month
On first launch Mariner offers a free month of everything. Confirm it in the App Store sheet and every feature is unlocked; after the month it is US$29.99 a year unless you cancel at least 24 hours before it ends. You can also buy Mariner once for US$79.99. Both plans are the same app — see Pricing and the free month.
Prefer to look first? Look around first opens the app read-only: you can browse the sample collection and export anything, and the offer stays in the toolbar. Your purchase follows your Apple Account rather than the machine: on another Mac, open the plans and press Restore Purchase. Family Sharing is enabled.
Without a subscription nothing is ever deleted — everything stays readable and exportable; editing and sending wait until you subscribe.
Language
Mariner is available in English, Spanish and Brazilian Portuguese and follows the macOS language setting. To run it in a different language than the system, open System Settings → General → Language & Region → Applications, add Mariner and pick the language; relaunch the app.
Settings at a glance
Open Settings with ⌘,.
- Appearance — reduce motion, reduce haptic feedback, and whether to track exploration milestones (the small log under Help → Exploration Log).
- Network — the app-wide HTTP proxy with host, port and a bypass list. See Mac integration.
- MCP — the local server that lets agents use your collections. See MCP server.
- iCloud — the sync toggle and its status. See Mac integration.