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iOS 26.0 Simulator runtime missing on Mac_arm64 builders (Xcode 26 upgrade) #180014
Description
We are upgrading to Xcode 26.0.1 (Build 17A400). While Xcode itself installs correctly, tests running on Mac_arm64 bots are failing because the iOS 26.0 simulator runtime is not available.
The create_simulator step (or flutter build) fails with:
[Error (Xcode): iOS 26.0 Platform Not Installed ](Mac_x64 plugin_lint_mac)
Xcode Version: 26.0.1 (17A400)
Target: iOS 26.0 Simulator
Unlike the Intel bots (where iOS 26 is unsupported - #170294), these ARM bots can run the simulator, but the runtime component appears to be missing from the environment.
proposed fixes:
Fallback: Update create_simulator.sh to handle the specific runtime identifier for Xcode 26 if it differs from the default expectation (e.g., ensuring it falls back to the bundled iOS 26.0 release).
Activity
vashworth commentedon Dec 19, 2025
@okorohelijah Please include links to builds that are failing due to this
vashworth commentedon Jan 13, 2026
This was same root cause as #170294 and should be fixed.
okorohelijah commentedon Jan 14, 2026
re opening because of #170294 (comment)
github-actions commentedon Feb 19, 2026
This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of
flutter doctor -vand a minimal reproduction of the issue.