Cirrus Labs is joining OpenAI: What this means for the future of Tart and Orchard

Cirrus Labs spent nine years building tools that a lot of Mac CI/CD pipelines depend on. Now Cirrus Labs is joining OpenAI, and the tools they built are heading toward open source with no dedicated team behind them. If any of those tools are core to your pipeline, you probably have one question: now what?

What the Cirrus Labs deal means for their customers

On April 7, 2026, Cirrus Labs announced it is joining OpenAI. Here's what that means for the tools you may be running today.

Tart (macOS virtualization), Vetu (Linux virtualization), and Orchard (orchestrator for Tart VMs) will be re-released under a more permissive open-source license, and licensing fees are going away
Cirrus CI is shutting down on June 1, 2026
Cirrus Runners are closed to new customers, though existing contracts will be honored through their contract end dates

Cirrus CI and Cirrus Runners are ending

Cirrus CI is shutting down on June 1. If it's part of your pipeline, you need a replacement before then.

If you're on Cirrus Runners, your contract will run out its term. After that, you’ll need to explore other macOS runner options. There are several mature options on the market.

Tart, Vetu, and Orchard are truly open-source software now

Tart, Vetu, and Orchard will continue to exist as open-source tools, but the dedicated team that built and maintained them is moving on to other projects at OpenAI. Here's what that means for your pipeline.

Open-source tools need maintenance. They need someone watching for software updates and security patches, and that responsibility will now fall to your team.

If any of these tools is core to your production CI pipeline today, you have a decision to make:

Option 1: Bet on the open-source community to maintain what Cirrus Labs started

Plenty of open-source projects thrive without a single company behind them. But that only works when someone picks up the baton. Right now, there's no clear signal that anyone will. The Cirrus Labs team is moving to OpenAI. The project's future depends on whether contributors show up, stay engaged, and keep pace with macOS updates and Apple silicon changes. That's not a given.

Option 2: Take on that maintenance work in-house

If you need certainty, you can own it yourself. That means tracking macOS releases, testing compatibility, patching issues, and building new features as your needs evolve. It's doable, but it's a real engineering commitment. Every hour spent on infrastructure maintenance is time not spent on your product.

Option 3: Migrate to a supported, enterprise-grade alternative

Orka provides a comparable solution to Tart and Orchard that MacStadium maintains and updates for you. And with the enterprise security (RBAC namespaces, role bindings, audit logs, SSO/SAML, and integration with corporate security), dedicated support (24/7 SLA with tiered, hands-on engineering support), and a defined product roadmap, Orka is the best option for Mac CI/CD on the market.

If you’re running Tart + Orchard today, look at Orka

Tart and Orchard work. The problem is that nobody is guaranteeing they'll keep working. When Apple ships a new version of macOS, someone has to test compatibility and push a fix before your pipeline breaks. That used to be the Cirrus Labs team. Now that someone is you. Whether the open-source community steps up is an open question, and your production pipeline probably shouldn't depend on the answer.

Orka covers the same core use case as Tart and Orchard, but it comes with a team that has been managing Mac infrastructure at enterprise scale since 2011. Every macOS update gets tested. Every issue has a support path. The software is built by people who have spent over a decade learning how Mac behaves at scale in ways that a newer open-source project simply hasn't had time to encounter yet.

Mac isn't just part of our business... it's our only business. If your pipeline depends on Tart or Orchard, Orka is worth a serious look.

No pressure. Just a real look at what enterprise Mac CI/CD can look like when it's built to scale.