To create fillable forms on your Mac using PDF Reader Pro, follow these steps: 1. Open PDF Reader Pro on your Mac. 2. Click on 'File' in the menu bar and select 'Open' to choose the PDF file you want to make fillable. 3. Once the PDF is open, go to the 'Forms' tab in the toolbar. 4. Select 'Add Text Field' to insert a text box where users can input information. 5. Use 'Add Check Box' to include checkboxes for options. 6. Choose 'Add Radio Button' for multiple-choice questions. 7. Use 'Add Combo Box' or 'Add List Box' for dropdown menus. 8. Adjust the size and position of the fields as needed by clicking and dragging them. 9. Save your changes by clicking 'File' and then 'Save' or 'Save As' to keep a copy of the fillable form. 10. Test the form by filling it out to ensure all fields work correctly. Your fillable form is now ready to use!