Osaurus runs AI agents on Mac with local or hosted models, according to its product page.
Freemium
Osaurus
Osaurus provides a native macOS environment for AI agents with different models and persistent memory, according to its repository.
About Osaurus
Osaurus is an open-source harness for macOS, built in Swift for Apple Silicon, that sits between the user and local or cloud language models. It provides agents with their own prompts, persistent memory, and tools, and can run an agent loop with file, search, and git tools in a chosen working folder.
It works offline when used with local models; connecting to a cloud provider sends data outside the Mac. It requires macOS 15.5+ on Apple Silicon, and local storage is plaintext by default with opt-in encryption. The built-in Orchestrator does not include a working folder, sandbox, browser, or computer use.
Key features
- Use local models offline or connect to cloud models
- Create custom agents with separate prompts, memory and themes
- Run agent loop with file, search and git tools
- Execute code in isolated Linux VM with shell and dev tools
- Automatic tool and skill selection by task with RAG search
- Manage app with CLI commands for UI, server and status
Best for: Mac users on Apple Silicon who want to run agents with local models and on-device memory.
Good for
- Open source under MIT license and built in Swift for Apple Silicon
- Supports offline use with local models, with standard and Raptor-bundled downloads
- Agents have persistent memory and can run code in an isolated Linux VM
Watch out for
- Requires macOS 15.5 or later on Apple Silicon
- Built-in Orchestrator lacks working folder, sandbox, browser and computer use
- Local storage is plaintext by default; encryption is opt-in
Osaurus at a glance
- Category
- Software & Utilities › Mac Apps
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- macOS
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Osaurus FAQ
How do I install Osaurus?
Run brew install --cask osaurus or download the .dmg from Releases, then launch from Spotlight or with osaurus ui.
What is the difference between the two downloads?
The standard build is about 70 MB and downloads a model during onboarding; the full build is about 4 GB with Raptor 0.6 bundled and installs to ~/MLXModels.
What are the system requirements?
macOS 15.5 or later on Apple Silicon.
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