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I'm using Mathematica 11 on Mac. When I start Mathematica and create a new notebook then do some simple calculation like 2 + 2 and press Shift+Enter, it continues running and never stops. The title of the notebook is Untitled-1 (Running...) then. I can use Abort Evaluation menu item under the Evaluation menu to abort the operation. But after that I still can't do any calculations and the symptom is exactly the same. I have to stop and start the local kernel in order to use it normally. Anyone can help to point me the problem? Thank you.

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  • $\begingroup$ If you have not done so already disable the suggestions bar and try again. $\endgroup$ – Mr.Wizard Sep 23 '16 at 2:20
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    $\begingroup$ @Mr.Wizard, I disabled it right now and it still the same. $\endgroup$ – Just a learner Sep 23 '16 at 2:23
  • $\begingroup$ Okay. After carefully making a copy of your configuration files the next step would be a reset as described in support.wolfram.com/kb/12464 -- please try that. $\endgroup$ – Mr.Wizard Sep 23 '16 at 2:26
  • $\begingroup$ If that does not work please report this to official support; it may be a packlet problem like (92931) $\endgroup$ – Mr.Wizard Sep 23 '16 at 2:32
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    $\begingroup$ I think I found the reason. I unchecked "Run kernels at a lower process priority" under the "parallel" tab of the Preference panel and suddenly it works. $\endgroup$ – Just a learner Sep 23 '16 at 3:04

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