Moving to FreeCells
In FreeCell, Baker's Game, Eight Off, and SeaTowers, a right mouse button click will force move a card to a freecell if it cannot be played to a foundation.
As described before on a late-model MacBook, use the two finger tap to simulate a right-button mouse click.
Finally, if the above are not available, a mouse click with the key depressed is also a valid shortcut to force move a card to a freecell.