After upgrading my MBP from Mavericks to Yosemite, the "CPU History" option of the Activity Monitor only showed one aggregate graph.

After reinstalling Yosemite from scratch, I suddenly have 8 tiny graphs, one for each core, which I find too tiny to be useful. Is there any way to switch the Dock icon of Activity Monitor back to the single graph?


I saw this on a fresh install on 10.10.4. To fix it, close Activity Monitor and then:

defaults write com.apple.activitymonitor IconType -int 4
  • This fix still works in Sierra 10.12.5. Thanks. – maksimov May 26 '17 at 11:46
  • Doesn't work on 10.13.6! :( – BK- Sep 8 '18 at 3:31
  • It works in Mojave / 10.14, but the command should be: defaults write com.apple.activitymonitor IconType 4 (without the -int) – Matt Zukowski Dec 8 '18 at 3:54
  • Does not work for me. On a 10.14.3 machine where it does not show all cores (but a composite graph, like I want), the value of the IconType is 6. Setting it to that on another machine with 10.14.3 does not make it stop displaying all the cores. – e40 Feb 23 at 17:51

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