Answer: The most popular language for writing Apple MacOS applications is Swift.
Answer analysis:
Swift is a modern programming language developed by Apple, optimized for the development of iOS, macOS, watchOS, and tvOS applications.
It features concise syntax, type safety, and memory management, designed to reduce program errors and provide higher performance and security.
Swift's syntax design makes it easy to learn and use, while also supporting modern programming features such as closures, generics, and type inference, thereby improving development efficiency and application quality.
In addition, Swift is closely integrated with Apple's ecosystem, including Xcode, an integrated development environment (IDE), which provides developers with rich resources and tool support.
Xcode integrates multiple tools such as code editors, compilers, debuggers, and supports Interface Builder, allowing users to intuitively design user interfaces.
Swift seamlessly integrates with the Cocoa and Cocoa Touch frameworks, providing a rich set of libraries that make developing applications for Apple platforms faster and more efficient.
Although Objective-C, as an early Apple development language, still has an important place in Mac development, especially for some old projects and frameworks, Swift has become the most popular language for developing MacOS applications with its modern features and full support from Apple.
In addition, languages such as C/C++ also have a place in the development of applications with high performance requirements, but they are not the preferred language for writing MacOS applications.
In summary, Swift has become the most popular language for writing Apple MacOS applications due to its modern features, easy-to-learn syntax, and close integration with the Apple ecosystem.