To customize the default font and spacing in Microsoft Word on Mac, you can follow these steps:
1. Click on "File" and navigate to "Style…".
2. Select "Normal" from the styles list and click on "Modify…".
3. Adjust the font, font size (pt), line spacing, and other attributes to your preferred settings. For example, you may change the font to "Times New Roman", set the font size to "12 pt", and select single line spacing. Click "OK" when you're done with your modifications.
4. You may receive a prompt asking if you want to update the style based on the changes you made. Click "Yes" to confirm the changes.
By following these steps, you can tailor the default font and spacing settings in Microsoft Word on your Mac to suit your preferences.