i I have a MacBook Pro with Retina. Running Yosemite, latest version of Fusion, running Windows 7 64 and Windows XP
A while back, I noticed while using Windows 7 vm, when in the vm when I hold down left mouse button, to either drag or encircle items, the cursor is nearly uncontrollable. It is way too sensitive, I move the mouse a very small distance and cursor moves dramatically and seems to drift on it's own. So I tested in another vm Windows XP, exactly the same thing. So I tried a third vm of OS X Mavericks and it works as normal.
So I then swapped mouse buttons in the vms and the swapped button worked normal. When I switched back the buttons to normal repeats same actions as above.
I have also tried changing video driver settings, resolution, etc, did not change the issue, even uninstalled and reinstalled VMware tools in both vms no change.
I've changed batteries in the mouse itself (Magic Mouse). Never had this problem before, driving me crazy to figure this out.
Also created a new Windows 7 vm from scratch, same mouse issues. Any help would be grateful.