[enhancement]: Add macOS 26.x (Tahoe) to the pool of MS-hosted agents

[alfjorgen]

Describe your feature request here

We are building our iOS app in Azure DevOps. When publishing a build today, I got the following message from Apple:

ITMS-90725: SDK version issue - This app was built with the iOS 18.5 SDK. Starting April 2026, all iOS and iPadOS apps must be built with the iOS 26 SDK or later, included in Xcode 26 or later, in order to be uploaded to App Store Connect or submitted for distribution.

Xcode 26 requires macOS 26, so to avoid service interruption (or a lot of work by setting up a self-hosted agent), we would love to get access to the macos-26 image from within Azure DevOps.

The image is already available from GitHub Actions, https://github.com/actions/runner-images/blob/main/images/macos/macos-26-arm64-Readme.md

[lyudad]

Have same warning from apple yesterday

[Bloodyairtimer]

Is there a planning available for when we can expect this agent to be available on Azure Devops?