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Helpful answers
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Sep 29, 2016 3:25 PM in response to dhotsinpillerby chris_g1,Hi dhosinpiller,
I understand that after updating to macOS Sierra, some of your apps are not opening. I know it's important for your computer to work as expected, so I'm happy to help.
Do any apps open as expected?
To start, let's reset your SMC. This can often help with performance issues such as this:
Reset the System Management Controller (SMC) on your Mac - Apple Support
If this doesn't help, then let's test this issue in another user account. Follow the steps here to do so:
How to test an issue in another user account on your Mac - Apple Support
Thanks for using the Apple Support Communities. Cheers! -
Sep 29, 2016 5:26 PM in response to chris_g1by dhotsinpiller,Only about half of the apps open and resetting the SMC did not work and i am on the only user account on the computer
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Sep 29, 2016 5:42 PM in response to dhotsinpillerby Allen A,dhotsinpiller,
Thanks for the followup and additional details. By testing in a new user account, we are able to further isolate the cause of this issue. The article that was shared about testing in a new user also includes the steps for creating a user if you don't already have one.
Please follow all of the steps in that article, and then use the steps here to test it in safe mode as well:
Try safe mode if your Mac doesn't finish starting up - Apple Support
Cheers! -
Sep 30, 2016 12:00 PM in response to dhotsinpillerby dianeoforegon,You can also test in the Guest User.
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Sep 30, 2016 3:55 PM in response to Allen Aby dhotsinpiller,no go on the safe mode, still get the same error message.
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Oct 2, 2016 6:20 PM in response to dhotsinpillerby dhotsinpiller,tested in guest user, still won't open apps like mail, FaceTime, app store, iMessage will not open now
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Oct 2, 2016 7:26 PM in response to dhotsinpillerby dianeoforegon,Looks like you will need to reinstall Sierra over itself.
How to reinstall OS X
