Changing your Mac wallpaper is a straightforward process. Here are the steps:

Method 1: Using System Preferences

1. Open System Preferences:
   • Click on the Apple logo in the top-left corner of your screen.
   • Select “System Preferences” from the drop-down menu.
2. Choose Desktop & Screen Saver:
   • In the System Preferences window, look for and click on “Desktop & Screen Saver.”
3. Select Wallpaper:
   • In the Desktop & Screen Saver window, you’ll see various tabs. Choose the “Desktop” tab.
4. Choose a Category:
   • On the left side, you’ll see a list of categories. Click on the category containing the wallpaper you want.
5. Select Wallpaper:
   • Browse through the available wallpapers on the right side and click on the one you want to use.
6. Set Wallpaper:
   • After selecting a wallpaper, you can set it as your desktop background immediately by closing the System Preferences window.

Method 2: Using Finder

1. Locate the Image:
   • Find the image you want to set as your wallpaper. It could be in your Pictures folder or any other location.
2. Right-Click or Control-Click:
   • Right-click or Control-click on the image file.
3. Choose “Set Desktop Picture”:
   • From the contextual menu, choose “Set Desktop Picture.”

Method 3: Using Image Viewer

1. Open Image Viewer:
   • Open the image you want to set as your wallpaper using an image viewer (Preview, Photos, etc.).
2. Select “Set Desktop Picture”:
   • In many image viewers, you can find an option in the menu or toolbar to set the current image as the desktop picture.

Additional Tips:

• Adjusting Wallpaper Settings:
  • In the Desktop & Screen Saver preferences, you can adjust settings such as picture position, color, and screen saver options.
• Customizing Wallpaper:
  • You can customize your wallpaper further by choosing a solid color or creating a slideshow with multiple images.

These steps should work for most versions of macOS. Keep in mind that the menu names and options might slightly vary depending on your macOS version.