Cloud Windows Sandboxes GA + macOS Preview

If you've been building with our cua libraries, you might've hit a limitation with local computer-use sandboxes: to run agents on Windows or macOS, you need to be on that OS - Windows Sandbox for Windows, Apple Virtualization for macOS. The only cross-platform option is Linux on Docker, which limits you to virtualizing Linux environments (see all local options here).

Today the story changes - we're announcing general availability of Cloud Windows Sandboxes and opening early preview access for Cloud macOS Sandboxes.

Cloud Windows Sandboxes: Now GA

Cloud Windows Sandboxes are now generally available. You get a full Windows 11 desktop in your browser with Edge and Python pre-installed, working seamlessly with all our Computer-Use libraries for RPA, UI automation, code execution, and agent development.

What's new with this release:

• Hot-start under 1 second
• Direct noVNC over HTTPS under our sandbox.cua.ai domain
• 3 sandbox sizes available:

Pricing: Windows Sandboxes start at 8 credits/hour (Small), 15 credits/hour (Medium), or 31 credits/hour (Large).

Cloud macOS Sandboxes: Now in Preview

Running macOS locally comes with challenges: 30GB golden images, a maximum of 2 sandboxes per host, and unpredictable compatibility issues. With Cloud macOS Sandboxes, we provision bare-metal macOS hosts (M1, M2, M4) on-demand—giving you full desktop access without the overhead of managing local sandboxes.

Preview access: Invite-only. Join the waitlist if you're building agents for macOS workflows.

Getting Started Today

Sign up at cua.ai/signin and grab your API key from the dashboard. Then connect to a sandbox:

python
from computer import Computer

computer = Computer(
    os_type="windows",      # or "macos"
    provider_type="cloud",
    name="my-sandbox",
    api_key="your-api-key"
)

await computer.run()

Manage existing sandboxes:

python
from computer.providers.cloud.provider import CloudProvider

provider = CloudProvider(api_key="your-api-key")
async with provider:
    sandboxes = await provider.list_vms()
    await provider.run_vm("my-sandbox")
    await provider.stop_vm("my-sandbox")

Run an agent on Windows to automate a workflow:

python
from agent import ComputerAgent

agent = ComputerAgent(
    model="anthropic/claude-sonnet-4-5-20250929",
    tools=[computer],
    max_trajectory_budget=5.0
)

response = await agent.run(
    "Open Excel, create a sales report with this month's data, and save it to the desktop"
)

FAQs

Need help?

If you hit issues getting either platform working, reach out in Discord. We respond fast and fix based on what people actually use.

Get started at cua.ai or join the macOS waitlist.