Mac System Monitoring Tools
Monitor processes, hardware sensors and infrastructure metrics from macOS.
Built-in monitors are a good first step; third-party tools add menu-bar convenience and infrastructure-wide dashboards.
Local Monitoring
See what's happening on this Mac right now.
- Activity MonitorBuilt into macOS
See what's using CPU, memory, energy, disk and network, and force-quit unresponsive apps.
Open:
Activity Monitor (in Applications > Utilities, or Spotlight)All versions of macOSApple documentation
- topBuilt into macOS
See live CPU and memory use per process from the terminal.
Terminal:
topAll versions of macOSApple documentation


Infrastructure Monitoring
Monitor many machines over time.