I heard my computer's fan spinning fast, so I checked Activity Monitor and saw that a process called InterCheck was using close to 96% CPU. What is this process and why's it using so much CPU?

In the Inspect window, it said that the parent process is launchd.


It's a real-time scanning process by Sophos Anti-Virus that scans your computer's running processes in the background.

The parent process is launchd so that when you accidentally kill the Intercheck process, it gets restarted.

  • 2
    Sophos has a utility that lets you look at the various logs that might cause Sophos to misbehave and use all of your processor. Take a look at it here: sophos.com/en-us/support/knowledgebase/33533.aspx#macgeneral It might be useful for the next time InterCheck acts out.
    – Zlatty
    Aug 20 '15 at 19:10
  • 1
    If anyone wants to temporarily disable it, go to Preferences, then the "On-Access" tab (far left), and turn the on-access scanner off. If this setting is greyed out, you'll need to unlock this panel by clicking the lock in the lower-left corner and entering your password. When you're finished doing whatever (installing a lot of stuff usually does it for me), you can turn it back on at your leisure.
    – jvriesem
    Nov 18 '15 at 2:12

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