I think there is a bug concerning the cursor in 5.5.3. It may be Mac, or it may be my mouse (Logitech with tilting scroll wheel, using the Logitech Control utility)
I often find the crosshairs are offset by small amount (up to 1/2") on the Project page when I’m lining up a cut. When I actually make the cut, it’s made in the right place, under the cursor.
I also often have the wrong cursor icon - an I-beam when it should be an arrow, double-headed arrow doesn’t appear when it should etc.
This never happened with 4.3 with the same hardware. I know there was a major change to the graphics foundation for Mac between the versions, so maybe that’s it?