NSError

NSError is a standard way in Apple's software development (used in macOS and iOS) to represent errors that occur during the execution of programs. It provides detailed information about what went wrong, including an error code, a human-readable description, and additional context. Developers use NSError to handle issues gracefully, allowing programs to respond to errors without crashing. For instance, if a file can't be found, NSError would help the software understand this and inform the user appropriately instead of just showing a generic failure message.