Difficulty: Moderately Easy
Step1
Create a 16 by 16 pixel document in your image editor to draw your cursor. It can be any shape and size within the document boundaries, including a solid square. You can edit an existing cursor by dragging it to the finder from Mighty Mouse.
Step2
Mask any pixels outside the cursor image. Save the new selection as an alpha channel, or keep the background transparent.
Step3
Animate your cursor. Create frames by duplicating your cursor vertically and making changes to each cursor. Make sure to space the frames evenly from top to bottom. Save the image in RGB TIFF format with transparency.
Step4
Open Mighty Mouse in your System Preferences. Click on the "Cursors" button to find the individual system cursors.
Step5
Select the cursor to edit. Drag the scroll bar if you can't see all of the available cursors.
Step6
Choose "Edit Image" from the settings pulldown menu (the menu with the gear icon.) The edit dialog will open featuring a preview window and cursor settings. Copy and paste each frame into the edit window. You can also set the cursor hot spot and animation speed.
Step7
Test your cursor. Make sure the cursor is still selected in the cursors bar and choose "Test Cursor" from the Gear menu. Your active cursor will change to the selected custom cursor. Click "Apply Changes" when you're satisfied.
