Media select and upload buttons are not working

I have tried on different sites and different themes – all the same – the media select and upload buttons do not work. Clicking on them doesn’t provide a way to select or upload background, logo, fav icon, etc. The color selector does work – other field changes seem to take effect, but no buttons… ??

I’ve tried several browsers, themes, different WP installs, etc. all on a mac os x Sierra – all the same – doesn’t work.

Any help is appreciated – love the colors otherwise! ??
Jason