The following tests are failing/timing out on the Mac ports:
Adding them to platform/mac/Skipped, please remove them when this is fixed.
It appears that http/tests/inspector/resource-har-conversion.html is the only test failing now.
Closing as invalid, as this bug pertains to the old inspector UI and/or its tests.
Please file a new bug (https://www.webkit.org/new-inspector-bug) if the bug/feature/issue is still relevant to WebKit trunk.