feat(python): support macOS x64 runtime wheels

python/sdk/tests/test_macos_deployment_target.py

@@ -16,8 +16,15 @@ checker = SimpleNamespace(**runpy.run_path(str(SCRIPT)))
 
 def test_otool_parser_uses_the_newest_macho_slice() -> None:
     output = """
+Load command 8
+      cmd LC_VERSION_MIN_MACOSX
+  cmdsize 16
+  version 10.7
+      sdk 11.1
+Load command 9
       cmd LC_BUILD_VERSION
     minos 11.0
+Load command 10
       cmd LC_BUILD_VERSION
     minos 13.5
     """
@@ -26,12 +33,34 @@ def test_otool_parser_uses_the_newest_macho_slice() -> None:
 
 
 def test_otool_parser_requires_a_deployment_target() -> None:
-    with pytest.raises(ValueError, match="contains no LC_BUILD_VERSION"):
+    with pytest.raises(ValueError, match="contains no macOS deployment target"):
         checker.parse_otool_deployment_target("Load command 0\n")
 
 
+def test_otool_parser_ignores_unrelated_version_fields() -> None:
+    output = """
+Load command 1
+          cmd LC_ID_DYLIB
+      cmdsize 48
+      current version 14.1.0
+compatibility version 1.0.0
+    """
+
+    with pytest.raises(ValueError, match="contains no macOS deployment target"):
+        checker.parse_otool_deployment_target(output)
+
+
 def test_wheel_tag_rejects_a_newer_executable_target() -> None:
     checker.ensure_compatible(Path("runtime"), (13, 5), "macosx_14_0_arm64")
+    checker.ensure_compatible(Path("runtime-x64"), (10, 7), "macosx_14_0_x86_64")
 
     with pytest.raises(RuntimeError, match="requires macOS 14.1"):
         checker.ensure_compatible(Path("spawn-helper"), (14, 1), "macosx_14_0_arm64")
+
+
+def test_wheel_tag_accepts_only_supported_macos_architectures() -> None:
+    assert checker.claimed_version("macosx_14_0_arm64") == (14, 0)
+    assert checker.claimed_version("macosx_14_0_x86_64") == (14, 0)
+
+    with pytest.raises(ValueError, match="unsupported macOS wheel platform tag"):
+        checker.claimed_version("macosx_14_0_universal2")

python/sdk/tests/test_release_version.py

@@ -60,6 +60,8 @@ def test_pep440_version_spells_a_prerelease_the_python_way() -> None:
 def test_macos_wheel_tag_does_not_claim_unsupported_node_platforms() -> None:
     assert build_python_release.PLATFORMS["macos-arm64"][0] == "macosx_14_0_arm64"
     assert build_python_release.PLATFORMS["macos-arm64"][1] == "deepseek-harness-sdk-runtime-macos-arm64"
+    assert build_python_release.PLATFORMS["macos-x64"][0] == "macosx_14_0_x86_64"
+    assert build_python_release.PLATFORMS["macos-x64"][1] == "deepseek-harness-sdk-runtime-macos-x64"
 
 
 def test_windows_wheel_tag_and_payload_are_x64_only() -> None:
@@ -95,7 +97,7 @@ def test_stage_sdk_keeps_distribution_module_and_runtime_pin_distinct(tmp_path:
 
 @pytest.mark.parametrize(
     ("target", "with_helper"),
-    [("linux-x64", False), ("macos-arm64", True), ("win-x64.exe", False)],
+    [("linux-x64", False), ("macos-arm64", True), ("macos-x64", True), ("win-x64.exe", False)],
 )
 def test_stage_runtime_copies_platform_payload(
     tmp_path: Path, target: str, with_helper: bool

python/sdk/tests/test_runtime_resolution.py

@@ -79,12 +79,11 @@ def test_current_platform_supports_windows_x64_only(monkeypatch: pytest.MonkeyPa
         runtime._current_platform_tag()
 
 
-def test_current_platform_rejects_macos_x64(monkeypatch: pytest.MonkeyPatch) -> None:
+def test_current_platform_supports_macos_x64(monkeypatch: pytest.MonkeyPatch) -> None:
     monkeypatch.setattr(runtime.sys, "platform", "darwin")
     monkeypatch.setattr(runtime.platform, "machine", lambda: "x86_64")
 
-    with pytest.raises(FileNotFoundError, match="macOS arm64"):
-        runtime._current_platform_tag()
+    assert runtime._current_platform_tag() == "macos-x64"
 
 
 def test_runtime_requires_ripgrep_sidecar(