Postman began supporting gRPC in 2022 and has rapidly matured. It is not a "pure" Mac gRPC client but a universal API platform.

Building a is a powerful way to ensure your desktop application remains fast and scalable. By leveraging Swift-gRPC and Protocol Buffers, you move the complexity of networking into a type-safe, generated layer, allowing you to focus on building a great user experience.

For developers on macOS looking to test, debug, or build gRPC services, the ecosystem offers a mix of native desktop apps, universal API platforms, and command-line tools. Top gRPC GUI Clients for macOS