Is there any command or shortcut to move a connected clip to playhead position? Many times I need to close a gap between connected clips and doing it manually is not very responsive in my machine (macbook pro late 2013 Retina) so it slows me down.
Not aware of any that will snap it over to the nearest connected clip. You probably already know that if you're close the , and . keys will move the selected clip 1 frame at a time and using them with the 'shift' key will move 10 frames at a time. For longer moves dragging with snapping on (N) seems to work well for me. YMMV.
Of course neither way will do anything about your machine responsiveness. Hope you find a simpler faster method - I'm sure you're not the only one who would benefit. Maybe a feature request to Apple?
If you're zoomed out too much your mouse won't have the accuracy or speed you're looking for. Zoom in enough and it works great. But no, there is no keyboard shortcut, but the function would be handy at times. Feedback form time.
I am not sure this other way would be more efficient or « passe-partout » but you could (once clip to move is selected as illustrated) put skimmer on selected clip, « shift F » to match frame, « back space » to delete selected clip, then Q to connect at « play head ».
This is not to delete GAP but to connect at play head …