Atop is not available for Mac but there are some alternatives that runs on macOS with similar functionality. The best Mac alternative is htop, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Atop and six of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to Atop are Glances (Free, Open Source), Bashtop (Free, Open Source), psutil (Free, Open Source) and Iotop (Free, Open Source).
Glances is a cross-platform monitoring tool which aims to present a large amount of monitoring information through a curses or Web based interface. The information dynamically adapts depending on the size of the user interface.
Easy to use, with a game inspired menu system. Fast and "mostly" responsive UI with UP, DOWN keys process selection. Function for showing detailed stats for selected process. Ability to filter processes. Easy switching between sorting options.
psutil is a module providing an interface for retrieving information on all running processes and system utilization (CPU, memory, disks, network, users) in a portable way by using Python, implementing many functionalities offered by command line tools such as: ps, top, df...