macOS (previously Mac OS X and later OS X) is a series of proprietary graphical operating systems developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Mac computers. Within the market of desktop, laptop and home computers, and by web usage, it is the second most widely used desktop OS, after Microsoft Windows.

Week is a task management tool where calendar is the main part of the app. To get things done you have to schedule them first and Week helps you to do exactly that. Create projects, assign them different colours and see how you spend your day.