What is the primary purpose of the App Store on a Mac?

The primary purpose of the App Store on a Mac is to buy and download applications and updates. The App Store serves as a centralized platform where users can easily browse, purchase, and install applications that enhance the functionality of their Mac computers. In addition to purchasing new software, users can check for and download updates to their installed applications directly through the App Store, ensuring they have the latest features and security patches. This streamlined process simplifies software management and enhances the overall user experience.

In contrast, managing system preferences, enhancing computer security, and configuring user accounts are functions carried out through other built-in Mac settings and tools, rather than through the App Store. These functions do not revolve around acquiring new applications or updates, which is the specific focus of the App Store.