I have a DaVinci Resolve 12.5 (non studio) on a Mac computer and have a problem on grabbing stills.
When I right click on the viewer in the color panel the green button at the top left corner goes off and the pop up menu opens. When I click on grab still in the menu nothing happens.
I tried to change stills path to no avail.
Is perhaps grabbing a still only a studio feature ?

Excuse my bad English.