Getting started with iStat Mini
iStat Mini is a compact way to keep an eye on your CPU, memory pressure, disk usage and network activity. Simply slide out macOS Yosemite’s Notification Center to glance at the stats, then slide it back again to free up your workspace.
After downloading iStat Mini from the App Store, please open the app from your Applications folder or Launchpad.
To install the iStat Mini widget, open Notification Center, then click the Today tab, click the 1 New (or Edit) button, then click the + button to the right of the iStat Mini text.
That’s it! iStat Mini should now be shown as a Today Widget in Notification Center.
To uninstall, drag the iStat Mini app from your Application folder to the trash icon in your Dock.