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 <[email protected]> 
> wrote:
> 
> 
>> On 27 Oct. 2016, at 10:56 pm, Marcus F Harris <[email protected]> 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.
> 
> -- The WA Macintosh User Group Mailing List --
> Archives - <http://www.wamug.org.au/mailinglist/archives.shtml>
> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml>
> Settings & Unsubscribe - 
> <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>
-- The WA Macintosh User Group Mailing List --
Archives - <http://www.wamug.org.au/mailinglist/archives.shtml>
Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml>
Settings & Unsubscribe - <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>