Chrome Version: 35503439a8693b3e945122f8f383e188638f13f0
OS: macOS 10.13

What steps will reproduce the problem?
(1) Run telemetry_gpu_unittests, telemetry_perf_unittests, or telemetry_unittests
(2) Get this exception:

INFO:root:Try printing formatted exception: <type 'exceptions.NotImplementedError'> Unknown mac version 17.0.0. <traceback object at 0x1024a30e0>
Traceback (most recent call last):
  <module> at /b/c/builder/Chromium_Mac_10_13/ir/third_party/catapult/telemetry/telemetry/testing/run_tests.py:302
    ret_code = RunTestsCommand.main()
  main at /b/c/builder/Chromium_Mac_10_13/ir/third_party/catapult/telemetry/telemetry/testing/run_tests.py:123
    return obj.Run(options)
  Run at /b/c/builder/Chromium_Mac_10_13/ir/third_party/catapult/telemetry/telemetry/testing/run_tests.py:162
    elif platform.GetOSVersionName() == 'xp':
  GetOSVersionName at /b/c/builder/Chromium_Mac_10_13/ir/third_party/catapult/telemetry/telemetry/core/platform.py:151
    return self._platform_backend.GetOSVersionName()
  Cacher at /b/c/builder/Chromium_Mac_10_13/ir/third_party/catapult/telemetry/telemetry/decorators.py:35
    cacher.__cache[key] = obj(*args, **kwargs)
  GetOSVersionName at /b/c/builder/Chromium_Mac_10_13/ir/third_party/catapult/telemetry/telemetry/internal/platform/mac_platform_backend.py:164
    raise NotImplementedError('Unknown mac version %s.' % os_version)
NotImplementedError: Unknown mac version 17.0.0.
Locals:
  os_version : '17.0.0'

Job run: https://luci-milo.appspot.com/buildbot/chromium.fyi/Chromium%20Mac%2010.13/1
Logs: https://luci-logdog.appspot.com/v/?s=chromium%2Fbb%2Fchromium.fyi%2FChromium_Mac_10.13%2F1%2F%2B%2Frecipes%2Fsteps%2Ftelemetry_unittests%2F0%2Fstdout

What is the expected result?
Test runs.

What happens instead?
Test errors out.

Please use labels and text to provide additional information.


For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.