The graphical installation wizard provides a quick and easy way to install PostgreSQL 9.5. As the installation wizard’s easy-to-follow dialogs lead you through the installation process, specify information about your system. When the dialogs are complete, the setup wizard will perform an installation based on the selections made during the setup process.Note that if you are invoking the graphical installer to perform a system upgrade, the installer will preserve the configuration options specified during the previous installation.When the PostgreSQL installation finishes, you will be offered the option to invoke the Stack Builder package manager. Stack Builder provides an easy-to-use graphical interface that downloads and installs applications, drivers and utilities and their dependencies. See for more information about using Stack Builder.After navigating to the Product Downloads page, select the PostgreSQL tab, and then choose the PostgreSQL installer that corresponds to your platform. When the download completes, extract the files using a system-specific file extractor.Section 3.1 demonstrates using the setup wizard to install PostgreSQL on a Windows system. You can follow the same procedure to install PostgreSQL on a Linux or Mac system.