mouse does not work in certain programs
I am using an iMac, 2.93 GHz Intel Core i7, 8 GB 1333 Mhz DDR3, OS x 10.9.2. In certain programs, my magic Mouse does not work. (iPhoto, Aperture, App store, for example). The keyboard works in those programs, but not the mouse. I switched to a different mouse, but that did not help. Does anyone have any suggestions on what might be going on?