Your pre-flight card.
Run the checklist. Read the gauges. When you're ready, your collaborator takes off. Free. On your machine. No sign-up. No credit card. No surcharge for being curious.
Status: On the runway • We'll signal when Rainline is cleared for takeoff
- macOS 12.0 (Monterey) or later
- Apple Silicon (M1/M2/M3) or Intel Mac
- 4GB RAM minimum (8GB recommended)
- ~100MB disk space
- Internet connection for provider APIs
Rainline is code-signed and notarized by Apple. You can also verify the SHA256 checksum of the .dmg file.
Coming Soon
To verify: open Terminal and run shasum -a 256 Rainline-Coming Soon.dmg, then compare the output.
The pre-flight checklist.
Four small checks. Then the hangar door opens.
Pick up the sealed envelope.
Click the download button. The disk image lands in your Downloads folder. The seal is intact.
Open the envelope.
Double-click. The disk image mounts. The contents are visible.
Walk to the hangar.
Drag the Rainline icon into your Applications folder. The collaborator is home.
Throttle up.
Open Rainline from Applications. On first launch, right-click and choose Open if Gatekeeper prompts. The collaborator wakes up.
What's New
Latest updates and improvements to Rainline.
Version 0.9.2
April 2026- Improved MCP server discovery and auto-registration
- Added per-conversation model switching
- Fixed KaTeX rendering edge cases in inline math
- Reduced memory usage during long conversations
Version 0.9.1
March 2026- New global hotkey customization in Settings
- Enhanced menu bar integration with unread indicators
- Added copy-to-clipboard for code blocks
- Security patch for local daemon socket permissions
Version 0.9.0
February 2026- Initial public beta release
- Multi-provider support: OpenAI, Anthropic, Groq, Mistral
- MCP integration with live tool execution status
- Privacy-first architecture with Keychain storage
Cleared for takeoff.
The checklist is complete. The seal is intact. The hangar door is open. Your collaborator is ready when you are.