How to Have Two Windows Open at the Same Time on a Mac
You work with files and folders on a Mac by using the Finder. When you want to see the contents of a folder, you create a new Finder window, and then you can use that window to browse files and folders on your hard drive. You might want to have two Finder windows open at the same time on your Mac, so you can move an item from one window to another, or because you are doing multiple tasks that work with items in different folders.
Click on the icon of the blue smiling face at the top right of the Mac's screen to use the Finder.
Click "File" from the menu at the top of the screen, and then click "New Finder Window." A window will appear on the desktop. By default, a new Finder window will open, showing the contents of the Home folder for the current user.
Click "Finder" and then "Preferences." Click the "General" tab. Click the "New Finder Windows Open" pull-down menu and select a different default folder to open each time you create a new Finder window.
Click "File" once more, and then click "New Finder Window" to open a second window. Alternatively, you can double-click on the icon of your hard drive, and a window will open to reveal the contents of your hard drive.
Click the icons above "View" in the finder window to change how the contents are displayed. You can view the contents as icons, a list, columns or by browsing the contents graphically with "Cover Flow," a mode in which you drag a slider to see images of files and folders.
Click on a folder in the Sidebar, which is the left pane of each Finder window, to browse its contents. The default items in the Sidebar include the "Applications," "Desktop" and "Downloads" folders, as well as mounted hard drives, CDs, DVDs and flash drives.