Cocoa is Apple's native application programming interface for their operating system macOS. Cocoa applications are written in Objective-C or Swift using Apple's development tools, Xcode and Interface Builder.
Cocoa applications have a distinctively 'Apple' look and feel as the Cocoa programming environment automates many aspects of an application to comply with Apple's human interface guidelines.
Freelance Cocoa Developers
A freelance Cocoa developer will have knowledge of Objective-C, Swift and Apple's development tools. They will be able to help you: