`macos_unit_test` fails with default sandboxing

[katre]

Trying to run one of the sample macos_unit_test targets, //examples/multi_platform/Buttons:ButtonsMacTests, gives an error (test.log and test.xcresult are attached).

Versions

Bazel version: 9.2.0
Xcode version: 26.5
rules_apple commit: 2d5d349

test.xcresult.zip
test.log

Errors

2026-07-23 19:00:59.268 xcodebuild[33230:6362940] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.

Followed by:

2026-07-23 19:00:59.883 xcodebuild[33230:6362972]  IDETestOperationsObserverDebug: Failure collecting logarchive: Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.apple.testmanagerd.control was invalidated: Connection init failed at lookup with error 3 - No such process." UserInfo={NSDebugDescription=The connection to service named com.apple.testmanagerd.control was invalidated: Connection init failed at lookup with error 3 - No such process.}

[katre]

@keith reports (in https://bazelbuild.slack.com/archives/CD3QY5C2X/p1784832887650699?thread_ts=1784827777.708689&cid=CD3QY5C2X) that --spawn_strategy=standalone is a workaround but this does not change the error for me.

[keith]

new fix #3036