Apple's online store for downloading paid and free Mac applications from third-party developers and from Apple. The Mac App Store provides a convenient venue for developers to publish for the Mac computer market. Launched in January 2011, it was added to the Snow Leopard operating system.Like the Apple App StoreThe Mac App Store is like the Apple App Store for iDevices with the same 70/30 revenue split. Submitted software is evaluated for compliance before it is made available to the public, and users can download all updated apps with one click. See online app store and Apple App Store.