The mouse is an old and obsolete way of navigating a desktop computer. Its inferior in every way to a tablet/pencil(stylus). I urge all iMac users to ditch the mouse immediately and replace it with a tablet/pencil. For those who have never used a tablet/pencil before, the basic thing to consider is that the active area on the tablet exactly matches the screen size of the iMac ( or any desktop ) itself. This means that if you move your pencil to the edge of the active area on your tablet, the cursor on the iMac screen moves to the edge too. Your cursor movement exactly mirrors the movement of your hand. In other words a tablet/pencil COMPLETELY ELIMINATES the annoying and energy sapping process of dragging your hand/finger multiple times to achieve a function. One small flick of the wrist is all it takes to move from A to B. The pencil also hovers above the tablet active area. This means you can move the cursor without the pencil touching the active area. This means selecting, double clicking or dragging files/folders COMPLETELY ELIMINATES the need to apply pressure when you do these tasks. All you have to do is tap the tablet active area with the pencil. HAND TENDONS WILL LOVE YOU FOR DITCHING THE MOUSE! The only downside to a tablet/pencil setup is that it takes a fews days to get used to it. But, once you do get used to it, the mouse just seems barbaric. Here is a photo of my setup ( trackpad alongside the keyboard not essential but i recommend it ): For those interested this is the best way to do it. Whatever you do, do not place the tablet in front of the iMac. The tablet should be a direct replacement for the mouse on the right or left hand side. I have mine slanted but it will be different for everyone. ( Reason my tablet is so large is because i am a graphics professional. Non graphics professionals will be just fine with a smaller tablet. ) To end this rant, i will say please just give this a try. Give yourself a few days to acclimatise and i promise that you will never use a mouse ever again. Combine a tablet/pencil with the magic trackpad 2 and you have the dream navigation set up. ( Magic Trackpad 2 is for scrolling and force touch options with your weaker hand. ) EDIT: Its a Wacom Intuos Pro medium in the photo.