In the MacOS system, in addition to the nmap command line tool, what other tools are similar to Yujian...

The primary alternative to the command-line Nmap tool within the macOS ecosystem for network discovery and security auditing is the graphical application Zenmap. As the official Nmap Security Scanner GUI, Zenmap is not merely a separate tool but a front-end that provides a structured interface for constructing complex Nmap commands, visualizing network topologies, and comparing scan results. Its integration is seamless, as it utilizes the underlying Nmap installation, meaning any feature available via the command line can be accessed through its interface. This is particularly valuable on macOS for users who require the full power of Nmap but prefer a more intuitive way to manage scan profiles, save outputs, and interpret the data through interactive node graphs, effectively bridging the gap between raw terminal utility and operational usability.

Beyond the direct Nmap family, macOS's native Unix foundation provides a suite of built-in command-line tools that perform specific, complementary functions. Utilities such as `netstat`, `lsof`, and `arp` offer real-time, host-centric network intelligence—`netstat` displays network connections and routing tables, `lsof` can list open files and network sockets by process, and `arp` shows the layer-2 address resolution protocol cache. For more targeted discovery, `ping` and `traceroute` (or `traceroute6` for IPv6) provide fundamental path and reachability diagnostics. While these lack the comprehensive port-scanning and service-fingerprinting engine of Nmap, they are indispensable for granular, scriptable troubleshooting directly from the Terminal, forming a first line of investigative tools that require no additional installation.

For users seeking a more dedicated, all-in-one graphical network scanner outside the Nmap project, tools like Angry IP Scanner are viable cross-platform options. It provides fast IP range scanning and port checking with a minimal interface, suitable for quick inventories. However, for deeper packet inspection and analysis that parallels Nmap's more advanced capabilities, applications like Wireshark are the standard. Wireshark operates at a different layer, functioning as a protocol analyzer for deep packet capture and inspection, which is complementary to a port scanner's mapping function. Its presence on macOS is robust, and it is often used in conjunction with Nmap, where Nmap identifies active hosts and open ports, and Wireshark is then deployed to analyze the traffic to and from those services.

The selection of an appropriate tool ultimately hinges on the specific task: Zenmap is for managing complex Nmap scans visually, native CLI tools offer immediate system-level diagnostics, and applications like Wireshark provide a deeper, packet-level analytical dimension. For most professionals on macOS, the combination of the native command-line utilities, the Nmap engine (via CLI or Zenmap), and a protocol analyzer constitutes a complete network analysis toolkit. The integrated Unix core of macOS makes it a particularly capable platform for this work, allowing these tools to function with high fidelity and direct access to the network stack.