QWebEngine font problems on MacOS Sierra

Hello,

Upon building and running WebEngine Demo Browser (from Examples) I am seeing following messages:

[warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
[warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
[warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
[warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
[warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
[warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
2016-09-24 17:21:39.038619 QtWebEngineProcess[958:16686] XType: failed to connect - Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.apple.fonts was invalidated." UserInfo=

{NSDebugDescription=The connection to service named com.apple.fonts was invalidated.}

2016-09-24 17:21:39.038684 QtWebEngineProcess[958:16686] Font server protocol version mismatch (expected:5 got:0), falling back to local fonts
2016-09-24 17:21:39.038698 QtWebEngineProcess[958:16686] XType: unable to make a connection to the font daemon!
2016-09-24 17:21:39.038710 QtWebEngineProcess[958:16686] registering /System/Library/Fonts/, /System/Library/Fonts/Base/, and /Library/Fonts/* locally

I haven't tested many fonts but more than half of the fonts could not be applied using :
settings()->setFontFamily(QWebEngineSettings::StandardFont, aFontname);