I’ve recently found that any Finder window needs two clicks to activate one of the red, yellow or green buttons (top left in any Finder window).
So when I want to minimise the window and I click the yellow button, it goes darker and then I have to click again to minimise. This occurs on all three red, yellow and green buttons in the Finder window. It only occurs in Finder not any other app.
Have I inadvertently switched on some accessibility function, and if so, how to I return the behaviour to a single click?