Every time MacOS is updated, it provides a new wallpaper. While working from home for a long time, there are times when I am insensitive to changes in the external environment, but I overcame it with a wallpaper that changes according to the time of day. The default templates provided by Apple are cool, but I discovered the platform after thinking that there might be other wallpapers. Just download the background you like from the website and apply it. There are also wallpapers created by various people, so check them out.
