How Can You Move the Mouse on a Mac a Precise Distance?

A little while ago, good friend of the show Slau wrote to the Mac Geek Gab boys, Dave Hamilton and John F Braun with a very interesting request. Dave included me on distribution thinking I might have some ideas. Here’s Slau’s original question:

MoveMouseIcon that I spent 2 hours creating for people who can't see.Hi Dave and John,

I have an issue that I’ve been trying to solve for quite some time. In fact, it would help a great deal of blind Mac users such as me.

I’m trying to find a way to move the mouse pointer in fixed increments (pixels or inches, whatever) using only the keyboard or preferably the numeric key pad. While there’s a way to move the pointer using Mouse Keys (within the Accessibility pane of System Preferences), the result is based on factors like delay and speed and vary according to how long you hold down the key so results aren’t exactly repeatable or translatable from user to user.

With VoiceOver, it’s possible to read the mouse coordinates in inches relative to screen or window but it’s not possible to enter coordinates manually. An example of where moving the pointer manually would be helpful and even necessary is when there are invisible elements on screen that are not recognized by voiceOver but need to be clicked. One can navigate to the closest recognizable element and then manually move the pointer from there. I’m thinking there might be an AppleScript or something that could perform the mouse pointer movement and it could be triggered by a keyboard shortcut. What do you think?

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