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GitHub has just announced the general availability of macOS 15 and Windows 2025 images for all GitHub-hosted runners. This release brings major updates for developers leveraging GitHub Actions to streamline their workflows and CI/CD processes. With these new images, users can now take advantage of the latest macOS and Windows environments directly on GitHub-hosted runners, enhancing their development processes. Whether you’re building or testing Swift applications or utilizing a range of Windows-based workflows, these new runners offer exciting opportunities for efficiency and flexibility.
How to Get Started with macOS 15 and Windows 2025 on GitHub
To start using macOS 15 in your GitHub workflows, you’ll need to update the runs-on parameter in your workflow file. The available options are macos-15, macos-15-xlarge, and macos-15-large, depending on the scale of your requirements. For example, the following snippet can be used to run your build and test processes on macOS 15:
“`yaml
jobs:
build:
runs-on: macos-15
steps:
– uses: actions/checkout@v4
– name: Build
run: swift build
– name: Run tests
run: swift test
“`
For Windows 2025, you can target the new image directly by updating runs-on to windows-2025 for standard runners. If you’re working with larger runners, you can manually select Windows Server 2025 from the Images UI console to configure your environment accordingly. Additionally, the latest tag for the runner images will be updated later in the year to point to these newer environments.
What Undercode Says:
The release of macOS 15 and Windows 2025 images is a significant milestone for GitHub Actions, further cementing GitHub as an essential tool for modern DevOps and continuous integration (CI) practices. With these updates, developers can ensure they are working with the latest operating systems, which helps optimize performance and compatibility with new features and tools.
For macOS, the introduction of macOS 15 brings users closer to the cutting edge of Apple’s software development ecosystem. It supports the latest versions of Xcode and offers a robust environment for building, testing, and deploying applications. Swift developers, in particular, will benefit greatly from this release, as it ensures compatibility with the latest Swift tools and libraries, which are crucial for rapid iteration and testing in production environments.
On the Windows front, Windows 2025 further modernizes GitHub Actions by providing a stable platform that is optimized for both general development and Windows-specific tools. By adopting this new image, developers can take advantage of up-to-date Windows Server 2025 features, which are designed to enhance performance, security, and scalability. Whether you’re working on Windows-based applications, services, or automation scripts, this upgrade significantly improves the capabilities and reliability of workflows running on GitHub-hosted runners.
Another important aspect to consider is the distinction between the standard and larger runners. The ability to choose between different runner sizes—such as macos-15-xlarge or windows-2025—gives developers more control over the resources allocated to their builds and tests. For larger, resource-intensive projects, this flexibility can make a world of difference, reducing build times and enhancing the stability of complex CI/CD pipelines.
However, with these upgrades come some potential challenges. GitHub notes that the new runner images contain different tools and versions compared to previous images, meaning developers will need to verify their workflows to ensure compatibility. This is a critical consideration, as a mismatch in tool versions or configurations could cause disruptions to existing pipelines.
Fact Checker Results:
- Tool Compatibility: The new macOS 15 and Windows 2025 images feature updated tools and versions that may cause compatibility issues with older workflows.
- Runner Options: Developers have the option to use macOS 15 and Windows 2025 images on both standard and larger GitHub-hosted runners, with specific instructions for each.
- Software Updates: The
latesttag for these runner images will be updated later in the year to reflect these new environments.
References:
Reported By: github.blog
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