According to http://www.color.org/v4spec.xalter "Most platforms and color management applications have now migrated to ICC V4, or are in the process of doing so."
Viewing the pdf version of the test page at http://www.color.org/version4pdf.pdf in Safari (v.9.0.3) or Preview.app (v8.1) suggests that OS X does support ICC v4. However, after using Safari's "Save as" function to download the pdf & opening that in AP, the large image looks identical to the third image in the "Expected results" section, captioned "The system does not support these ICC profiles."
I'm not sure how to interpret this. I would expect the results to at least match the second result, indicating AP supports version 2 profiles.
Have I misinterpreted how to use the test pdf, or is there something else I am missing about this?