Top Alternatives to MSI Afterburner

iStat is a comprehensive system monitoring tool for macOS, residing conveniently in your menubar. It provides a real-time overview of your system's performance, including CPU, memory, disk usage, network activity, temperatures, fan speeds, battery status, and more. With detailed graphs and configurable options, iStat empowers users to keep a close eye on their Mac's health and performance.

RivaTuner is a robust overclocking and hardware monitoring utility designed primarily for graphics cards, offering deep control and analysis of system components, though its development status should be noted.