Hi Marcus,

You DON’T delete anything that in Terminal!

You add the command prompt killall NotificationCenter after :~ cryptodomus$ 
killall NotificationCenter
Then hit Return key on your keyboard.
But - If you are not familiar with Terminal I would prefer you use Activity 
Monitor.app.
If you make a mistake in Terminal you can do a lot of damage.

1. Open Activity Monitor.app
2. Use the Search bar in the upper right corner Activity Monitor and type 
“Notif”, then click on “Notification Center”
3. Now click the (X) “Quit Process” button, and choose “Quit” to relaunch 
Notification Center

Notice the Notification Center menu bar icon disappears and reappears when you 
kill it from Activity Monitor, this indicates it has been restarted.

Cheers,
Ronni

13-inch MacBook Air (April 2014)
1.7GHz Dual-Core Intel Core i7, Turbo Boost to 3.3GHz
8GB 1600MHz LPDDR3 SDRAM
512GB PCIe-based Flash Storage

macOS Sierra 10.12.1
 
> On 3 Nov. 2016, at 9:08 pm, Marcus F Harris <cryptodo...@me.com> wrote:
> 
> Hi Ronni,
> Great but I’ve not attempted to work in terminal before.
> I found the app and opened it.
> the text “Marcus-F-Harris-iMac27:~ cryptodomus$ “.appears.
> Do I then delete this and enter the instructions you sent “killall 
> NotificationCenter” ?
> Or do I open a new window?
> Then what?
> Hate to stuff up in terminal.
> Cheers
> Marcus
> 
>> On 2 Nov. 2016, at 9:31 pm, Ronda Brown <ro...@mac.com 
>> <mailto:ro...@mac.com>> wrote:
>> 
>> Hi Marcus,
>> 
>>> Is it possible to reset NC somehow?
>> 
>> Reset/Restart Notification Center:
>> You can forcibly restart the Notification Center in Terminal.app by issuing 
>> the following command string:
>> 
>> killall NotificationCenter
>> 
>> Note there is no space between the names 
>> 
>> Cheers,
>> 
>> Ronni
>> 
>> Sent from Ronni's iPad4
>> 
>> On 2 Nov. 2016, at 4:41 pm, Marcus F Harris <cryptodo...@me.com 
>> <mailto:cryptodo...@me.com>> wrote:
>> 
>>> Hi Ronni,
>>> Thanks for your advice. Yes, Sierra otherwise operates just fine.
>>> I pretty much know how NC works as I had no issues before with El Capitan.
>>> 
>>> I wouldn’t be concerned except when NC is functioning it reveals Mail 
>>> alerts which cover the RHS of the screen and cannot be deleted. In fact if 
>>> I point the mouse any where near the alerts, the system will freeze with 
>>> the spinning wheel turning for up to 20 seconds.
>>> 
>>> I have turned all the NC alerts off  and that clears that up. As soon as I 
>>> turn Mail back on the alerts reappear and block the screen.
>>> Then I have to restart.
>>> 
>>> I have a lot of emails in iCloud as I’m uncertain how to delete them en 
>>> masse so maybe that’s an issue
>>> 
>>> Is it possible to reset NC somehow?
>>> Cheers
>>> 
>>> Marcus
>>> Marcus F Harris
>>> cryptodo...@me.com <mailto:cryptodo...@me.com>
>>> Marcus F Harris
>>> cryptodo...@me.com <mailto:cryptodo...@me.com>
>>> iMac 27D Late 2009
>>> OS10.12.1
>>> 3 GHz Intel Duo Core
>>> 8Gb Ram
>>> 
>>> 
>>> 
>>>> On 1 Nov. 2016, at 9:36 pm, Ronda Brown <ro...@mac.com 
>>>> <mailto:ro...@mac.com>> wrote:
>>>> 
>>>> Hi Marcus,
>>>> 
>>>> I have not experienced any problems with Notification Center in Sierra or 
>>>> iOS 10 on my Macs and iDevices. So I don't think your issue is caused by 
>>>> Sierra.
>>>> 
>>>> Have you had a good read on how to use Notification centre in Sierra?
>>>> https://support.apple.com/kb/PH25142?viewlocale=en_US&locale=en_US 
>>>> <https://support.apple.com/kb/PH25142?viewlocale=en_US&locale=en_US>
>>>> macOS Sierra: Use Notification Center.                                     
>>>>              
>>>> Alerts, alarms, reminders, email-chances are you see a steady stream every 
>>>> day. Notification Center is Sierra's Grand Central Station for the 
>>>> information competing for your attention. It's settings control which apps 
>>>> can post messages to the upper-right corner of your display, as well as 
>>>> how those messages look.
>>>> The Notification Center sidebar, which slides in from the right of your 
>>>> screen, gives you an overview of it all.
>>>> 
>>>> Have you set control Notifications' look? Individual notifications appear 
>>>> at the top-right of the screen. You can tweak how they appear, or whether 
>>>> they appear at all, on an app-by-app basis.
>>>> Go to System Preferences > Notifications and select an app from the list 
>>>> at the left. Now set up the way that app will notify you at the right. You 
>>>> can pick from three Notification styles.
>>>> 
>>>> Cheers,
>>>> Ronni
>>>> Sent from Ronni's iPad4
>>>> 
>>>> 
>>>> On 1 Nov. 2016, at 7:29 pm, Marcus F Harris <cryptodo...@me.com 
>>>> <mailto:cryptodo...@me.com>> wrote:
>>>> 
>>>>> Hi,
>>>>> I’m still trying to resolve this corruption of (NC) Notification Centre.
>>>>> NC operated well with El Capitan but is problematic with Sierra.
>>>>> 
>>>>> I think it is due to interference between Google and Apple mail accounts. 
>>>>> I have tried turning them on and off alternately and the freezing of NC 
>>>>> arises when email notices present to be either closed or replied to.
>>>>> If I try either of those options, nothing happens and the NC freezes for 
>>>>> up to 20 seconds. 
>>>>> As long as these email notices don’t appear I can switch on NC.
>>>>> 
>>>>> BY THE WAY the email notices that appear are all from my gmail account.
>>>>> 
>>>>> I’m going to turn off gmail completely and access them from the website 
>>>>> and see if that makes a difference.
>>>>> If you have any other ideas, please feel free to let me know.
>>>>> 
>>>>> 
>>>>> Cheers
>>>>> 
>>>>> Marcus
>>>>> Marcus F Harris
>>>>> cryptodo...@me.com <mailto:cryptodo...@me.com>
>>>>> Marcus F Harris
>>>>> cryptodo...@me.com <mailto:cryptodo...@me.com>
>>>>> iMac 27D Late 2009
>>>>> OS10.12.1
>>>>> 3 GHz Intel Duo Core
>>>>> 8Gb Ram
>>>>> 
>>>>> 
>>>>> 
>>>>>> On 28 Oct. 2016, at 2:04 pm, Marcus F Harris <cryptodo...@me.com 
>>>>>> <mailto:cryptodo...@me.com>> wrote:
>>>>>> 
>>>>>> Thanks Peter and Ronni,
>>>>>> I have an apple Bluetooth mouse only.
>>>>>> I have two gmail accounts and one iCloud account.
>>>>>> I will try turning off the gmail accounts and see if that helps.
>>>>>> Let you know ASAP.
>>>>>> Cheers
>>>>>> Marcus 
>>>>>> 
>>>>>> Sent from Marcus iPhone 5
>>>>>> 
>>>>>>> On 28 Oct. 2016, at 7:58 am, Peter Hinchliffe 
>>>>>>> <hinch...@multiline.com.au <mailto:hinch...@multiline.com.au>> wrote:
>>>>>>> 
>>>>>>> 
>>>>>>>> On 27 Oct. 2016, at 10:56 pm, Marcus F Harris <cryptodo...@me.com 
>>>>>>>> <mailto:cryptodo...@me.com>> wrote:
>>>>>>>> 
>>>>>>>> Someone else may have problems with the Notification Centre since 
>>>>>>>> installing Sierra and had feedback that I missed.
>>>>>>>> 
>>>>>>>> Notifications appear as before on the RHS of the screen. These are 
>>>>>>>> mostly MAIL notifications.
>>>>>>>> 
>>>>>>>> Before installing Sierra with El Capitan all my apps worked well.
>>>>>>>> 
>>>>>>>> Now Notifications will not respond to mouse clicks and the system 
>>>>>>>> freezes for up to 15 seconds before responding.
>>>>>>>> 
>>>>>>>> I have tried disk doctor and looking for a solution in System prefs, 
>>>>>>>> but I’m stumped.
>>>>>>>> 
>>>>>>>> Any advice gratefully received
>>>>>>>> 
>>>>>>>> 
>>>>>>> 
>>>>>>> Everything is working fine on my system Marcus. Whatever else is going 
>>>>>>> it’s unlikely to be a Sierra issue per se; more likely something else 
>>>>>>> you have running that needs an update.The tried and true simple trouble 
>>>>>>> shooting  resource is to log into another account on your computer 
>>>>>>> (create a new one if necessary) and see if the problem persists, just 
>>>>>>> to rule out the possibility of something specific to your account.
>>>>>>> 
>>>>>>> Peter Hinchliffe        Apwin Computer Services
>>>>>>> FileMaker Pro Solutions Developer
>>>>>>> Perth, Western Australia
>>>>>>> Phone (618) 9332 6482    Mob 0403 046 948
>>>>>>> --------------------------------------------------------------------
>>>>>>> Mac because I prefer it -- Windows because I have to.



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