Spotlight easily locates the “hidden” wallpaper The first hit will probably be the folder you want. Once Spotlight comes up, type Default Collections. To locate them for yourself, just activate Spotlight by clicking the magnifying glass in the top right of the menu bar, or pressing Command-Space on your keyboard. Spotlight, however, finds them quite handily. The images are just in a folder that you might not think to check. I say they’re hidden, but they’re really not. They look beautiful in the screensaver, and they’ll work just as well for great wallpaper backgrounds on your Mac’s display. There are also nature patterns, images of the cosmos, and aerial photographs. These images include gorgeous photographs from National Geographic, and more. They’re actually in a folder on your Mac, and the screensaver just reads them and uses them to save your monitor from suffering burn-in. Those images aren’t “baked into” the screensaver.
If you’ve ever mucked around with the screensavers, you’ve likely noticed that quite a few of them use images to rotate and alternate on your screen to prevent burn-in. Great wallpaper is hidden in plain sight on your Mac The Images Used by Apple’s Screensavers
