I have recently downloaded photoshop free trial on a brand new Mac and it has lots of little issues, when I try to select a layer (on auto select) it selects lots of layers, it also sometimes only lets me move something up or down (as if the shift key is held down) and when I duplicate something using the alt shortcut it won't turn off, therefore duplicates each layer I touch. Its like its just not downloaded properly. Its also slow at times and faster at other times?? Please help!