After you locate icons online that you want to use to personalize your Mac, download them to your computer. Each icon set downloads as a disk image (.dmg) file, which is automatically converted to a folder when the download is complete. Go to “Desktop” tab, then click the checkbox next to “Change picture” and set the time interval, the default is a new background every 30 minutes; Select “Random order” as well for best results; Whatever your background picture was set to will be changed immediately, and then it will change again at the time interval you selected. Memory: By default, Docker for Mac is set to use 2 GB runtime memory, allocated from the total available memory on your Mac. To increase RAM, set this to a higher number; to decrease it, lower the number. Head over to /Library/Desktop Pictures and add Desktop Pictures to the Finder sidebar. Doing this will let you save a file more easily to this folder from TextEdit’s Save As dialog. Next, right-click this folder, go to Get Info, and make sure you have permissions set to Read & write.
To use a screen saver as your desktop background, first head to System Preferences > Desktop & Screen Saver > Screen Saver and select one of the screen savers included in OS X, or a that you’ve previously installed. Whichever one you choose, just make sure it’s selected as the active screen saver, even if you have it set to never start in the “Start After” duration drop-down menu. Next, launch Terminal (located in the Applications > Utilities folder), copy and paste the following command, and press the Return key on your keyboard to execute it: /System/Library/Frameworks/ScreenSaver.framework/Resources/ScreenSaverEngine.app/Contents/MacOS/ScreenSaverEngine -background You’ll see your default static desktop wallpaper image immediately replaced by your screen saver. 
Unlike a normal screen saver, however, the animation will play behind your desktop icons, interface, and windows, just like a standard wallpaper image. Pretty cool, right? How much is gemini2 for mac.
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How To Set The Same Image For Every Desktop Mac
Unfortunately, there are two caveats you should keep in mind. First, this trick requires that the Terminal window in which you entered the above command remain open. If you quit Terminal or close the window with the screen saver background command, your screen saver will instantly disappear and you’ll have your old static wallpaper image back. This also means that, by default, this change doesn’t persist after rebooting your Mac or logging out, although you can work around that limitation by to execute the script and setting it to automatically run when you log in to OS X. The second caveat is performance. Some OS X screen savers, especially complex third party screen savers, can eat up a good amount of CPU and GPU horsepower. While most modern Macs, even those with Retina displays, can handle a typical screen saver running on the desktop with minimal impact on system performance, those with multiple displays or older Macs may see performance issues with this method.