You can use POSIX API in Swift on MacOS
Swift on macOS can access POSIX APIs by importing the Darwin module. This gives you access to low-level system calls, file operations, and other Unix functionality. In my case I needed to call openpty() function from Swift application and handle raw file descriptors. import Darwin // Example: Get current working directory let cwd = getcwd(nil, 0) if let path = cwd { print("Current directory: \(String(cString: path))") free(cwd) } // Example: Create a directory (if app is not sandboxed) let result = mkdir("/tmp/testdir", 0o755) if result == 0 { print("Directory created successfully") } else { print("Failed to create directory: \(errno)") }