Maybe you don’t know that you can easily choose the picture that’s displayed on your desktop. Your Mac prepares a lot of desktop pictures that you can select for your desktop, moreover, you can use your own pictures or choose just one color for it.

The Desktop pane of System Preferences.

Great point is that: You can drag your favorite image from your desktop or a folder onto the thumbnail at the top of the pane to use the image as your desktop picture.

  1. On your Mac, choose Apple menu  > System Preferences, click Desktop & Screen Saver, then click Desktop.
  2. On the left, find a picture or color:
    • Pictures and colors that come with your Mac: Click the disclosure triangle next to Apple, then select Desktop Pictures or Colors to see thumbnails of available pictures and colors.

Dynamic desktop pictures can change spontaneously throughout the course of the day based on your current location. If Location Services is turned off in Privacy preferences, the picture changes according the time zone quantified in Date & Time preferences.

Some dynamic desktop pictures can also deliver still images so the desktop picture doesn’t distract from the light or dark appearance. For instance, if you select the dark appearance during macOS setup, the desktop picture is set to a dark still image. For using or don’t using a still image (if available), click the pop-up menu, then choose an option.

  • Your pictures: Click the disclosure triangle next to Photos (or iPhoto if available). If your pictures are in the Pictures or another folder, click the triangle next to Folders, then select a folder.

In order to add a folder, click the Add button , navigate to and select the folder, then click Choose.

In case you don’t see anything when you select the folder that contains your pictures, maybe they don’t have the right file format—JPEG, PICT, TIFF, PNG, or HEIC.For changing a picture’s format, open it in the Preview app, then save it in the new format. If pictures look fuzzy, try using larger ones, such as 1024 x 768 pixels.

  1. On the right, click the picture you like to use.

The desktop changes immediately, so you can check if the picture looks nice or not. When you use one of your own pictures, you can choose to have it fill the screen, be centered, or otherwise arranged. You can easily click around and test different pictures and arrangements until you choose the best.

In order to use all the pictures in a folder, select the “Change picture” checkbox, then choose how often you want the picture to change—like, every hour. The pictures are shown in the order they appear in the folder, or you can choose to show them in a random order.

Good point is, you can use a picture you have in the Photos app, select the picture in Photos, click the Share button in the Photos toolbar, then choose Set Desktop Picture.

Moreover, you can use a picture on the web as your desktop picture. To do this you can Control-click the image in the browser window, then select Use Image as Desktop Picture.