Add diagnostic details on available destinations.

Author: freakboy3742

.github/workflows/build.yml

@@ -367,6 +367,9 @@ jobs:
         with:
           persist-credentials: false
 
+      - name: List simulators
+        run: xcrun simctl list
+
       - name: Build and test
         run: python3 Platforms/Apple ci iOS --fast-ci --simulator 'iPhone 17e,OS=26.5'
 

Platforms/Apple/testbed/__main__.py

@@ -74,6 +74,12 @@ def xcode_test(location: Path, platform: str, simulator: str, verbose: bool):
     ]
     verbosity_args = [] if verbose else ["-quiet"]
 
+    print("Diagnostic - show xcodebuild destinations...")
+    subprocess.run(
+        ["xcodebuild", "-scheme", f"{platform}Testbed", "-showdestinations"],
+        check=True,
+    )
+
     print("Building test project...")
     subprocess.run(
         ["xcodebuild", "build-for-testing"] + args + verbosity_args,