The desktop, menu bar, and Help on your Mac
The first thing you see on your iMac is the desktop, where you can quickly open apps, search for anything on your iMac and the web, organize your files, and more.
Tip: Can’t find the pointer? To magnify it temporarily, slide the mouse back and forth quickly.
Menu bar. Use the menus and icons along the top of the screen to open new windows, connect to a Wi-Fi network, check your Wi-Fi status 
, change the volume 
, query Siri, and more. The menu items change, depending on which app you’re using.
Apple menu 
. The Apple menu in the upper-left corner of the screen contains frequently used items. To open it, click the Apple icon .
Help menu. Help for your iMac and apps is always available from the Finder. To get help, click the Help menu and choose macOS Help to open the macOS User Guide. Or type in the search field and choose a suggestion.
To learn more, see macOS User Guide.
Stay organized with stacks. You can use stacks on the desktop to keep files organized in groups (by kind, date, or tag), and to keep your desktop clean. To create stacks on your desktop, go to Finder and choose View, then select Use Stacks. To see options for your stacks, go to View > Group Stacks By. Then any new files you add to the desktop are automatically sorted into the appropriate stack. To view what’s inside a stack, click the stack to expand its contents. You can also place your cursor over a stack to view file thumbnails. To learn more, see Organize files in stacks on Mac in the macOS User Guide.
Keep reading to learn about The Finder on your Mac and other features of the desktop.