In the “Mac OS X Mavericks compatibility (as of November 22th, 2013)” article it is stated. VST Connect Performer is currently not working (update planned).
However, on the downloads page, dated November 14. 2013 (before the article) 10.9 is listed for “VST Connect Performer 2.0.0 · 25.7 MB”.
Both can’t be true, so which is?