Changing your Joomla homepage image is a simple process that can make a big difference in your website’s appearance. To change your image, first make sure you have the correct file saved on your computer. You can find your image file in the following location:
Mac: /Users/YourUserName/Library/Application Support/Joomla/templates/home
Next, locate the file called “images.php” in your Joomla root folder. This file contains all of the image files for your website.
To update your image, simply replace the old image file with the new one. Finally, restart your website to apply the changes.