Multiping is not available for Mac but there are some alternatives that runs on macOS with similar functionality. The best Mac alternative is PingPlotter, which is free. If that doesn't suit you, our users have ranked more than 10 alternatives to Multiping and six of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to Multiping are pingg (Free, Open Source), NetTK (Free, Open Source), noping (Free, Open Source) and PingDoctor (Paid).
liboping is a C library to generate ICMP echo requests, better known as “ping packets”. It is intended for use in network monitoring applications or applications that would otherwise need to fork ping(1) frequently.