# macOS Runners (M4 Pro) (https://tenki.cloud/docs/runners/macos-runners)

> For the complete documentation index, see [llms.txt](https://tenki.cloud/llms.txt)

Apple Silicon (M4 Pro) macOS GitHub Actions runners, with four sizes, macOS 15 and 26 images, and monthly image refreshes.

Tenki macOS Runners run on **Apple Silicon M4 Pro** hardware in four sizes, from 2 to 8 vCPU.
Standard runners are available with macOS 15 Sequoia or macOS 26 Tahoe.
Every job gets an ephemeral VM that is destroyed at job end; see [Security & Isolation](https://tenki.cloud/docs/trust/security.md).

macOS runners are available on all plans. Typical workloads: iOS builds and XCTest/XCUITest suites, macOS app builds and notarisation, React Native / Flutter / Unity iOS builds, and fastlane release pipelines with code signing.

## Sizes

Specifications for each size are on [Runner Sizes & Labels](https://tenki.cloud/docs/runners/sizes.md). Current rates are on the [Pricing page](https://tenki.cloud/docs/pricing.md).

## Standard images

Choose the operating system and default Xcode family with the `runs-on` label:

* `tenki-macos-15-{mini,small,medium,large}` runs macOS 15 Sequoia with Xcode 16 by default.
* `tenki-macos-26-{mini,small,medium,large}` runs macOS 26 Tahoe with Xcode 26 by default.

Each image includes multiple Xcode releases and simulator runtimes.
See GitHub's official software manifests for the current [macOS 15 ARM64](https://github.com/actions/runner-images/blob/main/images/macos/macos-15-arm64-Readme.md) and [macOS 26 ARM64](https://github.com/actions/runner-images/blob/main/images/macos/macos-26-arm64-Readme.md) toolchains.

Tenki mirrors these official GitHub-hosted software lists and refreshes its standard images once per month.
Exact tool and patch versions can change with each monthly refresh.

## Concurrency

The Team plan includes 4 concurrent macOS jobs by default; higher macOS concurrency is available on request. See [Limits & Concurrency](https://tenki.cloud/docs/runners/limits-and-concurrency.md).

Need more macOS concurrency? Email [hello@tenki.cloud](mailto:hello@tenki.cloud).