macOS Tahoe 26.5.1 RC Image Now Available

We're excited to announce a new image: macOS Tahoe 26.5.1 with Xcode 26.5, available today as a Release Candidate under the new getmac-tahoe-rc label. This image graduates our previous Tahoe 26.5 Beta to release-candidate quality with final SDKs and simulator runtimes.

What's New

The 26.5.1 RC image moves from beta SDKs to the final 26.5 toolchain and refreshes the pre-installed developer tooling:

• Xcode 26.5 — Build 17F42 with the final iOS 26.5, tvOS 26.5, watchOS 26.5, and visionOS 26.5 SDKs (no longer beta).
• Final 26.5 simulator runtimes — iOS 26.5 (23F77), tvOS 26.5 (23L470), watchOS 26.5 (23T570), and visionOS 26.5 (23O470), alongside the existing 26.1–26.4 and legacy 18.x runtimes.
• Updated CLIs — AWS CLI 2.35.5, Google Cloud SDK 573.0.0, and GitHub CLI 2.94.0.
• Language toolchains — Java 26.0.1 and Go 1.26.4.
• Mobile build tools — Fastlane 2.236.1 and CocoaPods 1.16.2.
• Node.js packages — TypeScript 6.0.3, npm 11.16.0, pnpm 11.7.0, and eslint 10.5.0.
• Android SDK — Build-Tools 34 & 35, Platform-Tools 37.0.0, NDK 27, and Android Emulator 36.6.11.

A Note on the Beta Label

With this release, we're temporarily retiring the getmac-tahoe-beta label. The beta image has graduated into this Release Candidate, so all 26.5 testing now happens on getmac-tahoe-rc.

After a two-week validation window, the RC image will be promoted to our primary stable build and become available under the getmac and getmac-latest labels. We'll announce the promotion here when it lands.

GitHub Actions Integration

Use the following labels in your runs-on field:

• getmac or getmac-latest — macOS Tahoe 26.3.2 with Xcode 26.4 (current stable)
• getmac-tahoe-rc — macOS Tahoe 26.5.1 with Xcode 26.5 (Release Candidate)

- runs-on: macos-latest
+ runs-on: getmac-tahoe-rc

For the full list of available labels, see our Workflow Labels documentation. For a complete breakdown of pre-installed tools, simulators, and SDKs, check out the Installed Tools & Libraries page.

Get Started

The RC image is live now. Point your workflow at getmac-tahoe-rc to validate your builds against the final 26.5 toolchain ahead of the stable promotion in two weeks.

As always, we'd love to hear your feedback — join our Discord community to share thoughts or request new tools.

— The GetMac Team