Double Click The Title Bar To Minimize An Application Os X El Capitan
1
Open Dock in System Preferences
Navigate to System Preferences > Dock.
2
Change the title bar behavior
Select the checkbox next to “Double-click a window’s title bar to..” and select “minimize” as the option in its dropdown.
Did you know you can also minimize applications in macOS by double-clicking the menu bar? Check out our guide to see how it’s done.