A macOS developer is responsible for developing, testing, and deploying software for Apple’s macOS operating system. This includes both desktop applications and system-level components. A typical day for a macOS developer might involve working on code to improve the performance of an existing application, adding new features to an app, or fixing bugs. They also need to ensure that their code integrates seamlessly with the rest of the operating system and other applications. In addition to writing code, macOS developers also need to perform regular maintenance tasks such as updating documentation and troubleshooting issues.