NO Bill, don't erase Time Machine! ... just let it keep backing up as normal as 
I mentioned below.

Sent from Ronni's iPad4


> On 31 Dec 2016, at 1:17 pm, Juliet Kitson <billand...@gmail.com> wrote:
> 
> G'day Ronni
> Thanks for that I was/nt quite sure so I will erase time machine and start 
> from scratch.
> Regards Bill
> 
>> On Sat, Dec 31, 2016 at 1:06 PM, Ronda Brown <ro...@mac.com> wrote:
>> Hi Bill,
>> 
>> Time Machine just continues working as before, backing up files that have 
>> changed since previous backup.
>> You will find the first backup after a OS system update will take more time 
>> as quite a lot of system files etc have been changed/updated.
>> 
>> Let it complete the first update, don't interrupt the Time Machine backup 
>> process!
>> 
>> Regards and HAPPY NEW YEAR!,
>> Ronni
>> 
>> Sent from Ronni's iPad4
>> 
>> 
>> > On 31 Dec 2016, at 11:39 am, Juliet Kitson <billand...@gmail.com> wrote:
>> >
>> > I have just upgraded to sierra 10.12.2 when I backup via time machine to a 
>> > time capsule does the old operating system get replaced with the new one.
>> > Regards Bill
>> -- 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>
-- 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>