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My mac is going very slow after I update xcode to 8.2 I checked activity monitor which is showing a process name ibtoold many times with huge memory consumption.enter image description here Can anyone help please?

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    What version of macOS X are you running? A poster in this thread at Apple Forums says that upgrading to Sierra fixed the problem. And this: "In my case, I noticed that if you set the root view's Top Bar value (Attributes Inspector > Simulated Metrics > Top Bar) from Inferred to Opaque Navigation Bar, it turns into hogging mode. Everytime you switch to this Nib file, your CPU usage turns up. Switching the value back to its default seems to resolve it."
    – IconDaemon
    Commented Dec 23, 2016 at 15:27
  • OS is EL Capton 10.11.6 Commented Dec 23, 2016 at 17:44
  • I quit the xcode but the logs are still there in activity monitor Commented Dec 23, 2016 at 17:44
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    Kill the ibtoold and xcode processes, then report back what happened.
    – owlswipe
    Commented Dec 23, 2016 at 23:28

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Did they finally disappear? I suspect it was updating/recompiling your Xcode interface files and once done, these processes should go away.

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  • Nope. They are still there. Commented Dec 23, 2016 at 17:45
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    Kill them and see what happens Commented Dec 23, 2016 at 21:37
  • killed all the processes but xcode is still slow responsive. May be it's an issue with xcode 8.2 Commented Dec 24, 2016 at 17:37

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