Fix GH action to run in macOS

Author: jhg

.github/workflows/ci.yml

@@ -19,7 +19,12 @@ jobs:
       - name: Build tests
         run: cargo test --no-run
       - name: Find test executable
-        run: echo "TEST_EXECUTABLE=$(find ./target/debug/deps/ -type f -perm /111 -name 'as_root-*')" >> $GITHUB_ENV
+        run: |
+          if [[ "$(uname)" == "Darwin" ]]; then
+            echo "TEST_EXECUTABLE=$(find ./target/debug/deps/ -type f -perm +111 -name 'as_root-*')" >> $GITHUB_ENV
+          else
+            echo "TEST_EXECUTABLE=$(find ./target/debug/deps/ -type f -executable -name 'as_root-*')" >> $GITHUB_ENV
+          fi
       - name: Run root-required test user_and_group_does_not_exist
         run: sudo -E -- "$TEST_EXECUTABLE --show-output --ignored --test user_and_group_does_not_exist"
         env: