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Hm.. It definitely works for us on MacOS:
Try with some other test suite? Perhaps the problem is in "https", try some test suite that's on "http"?
mankz:siesta mats$ webdriver lh/siesta/tests
Launching test suite, OS: MacOS, browser: Chrome 54.0.2840.71
[PASS] util/100_util_queue.t.js
[PASS] util/110_util_serializer.t.js
[PASS] util/120_util_xml_node.t.js
[PASS] util/130_rect.t.js
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