Hi Ronni

Thanks for the reassurance.   

I will turn T.M.  "on" after doing some neglected domestic chores.  Thanks also 
for your Spotlight comment - email arrived as I was writing this!   Its been a 
full day exercise to get to this point, so a night of Spotlight indexing will 
be a bagatelle.

Cheers
Alan

On 02/08/2012, at 7:19 PM, Ronda Brown <ro...@mac.com> wrote:

Hi Alan,

My comments in situ below.

On 02/08/2012, at 6:39 PM, Alan Smith <sma...@iinet.net.au> wrote:

> Hello all
> 
> I have upgraded from Snow Leopard to Mountain Lion and was about to switch 
> Time Machine back "on".   But Time Machine in System Preferences shows oldest 
> backup = none and latest backup = none.  WAMUG discussion on the Lion upgrade 
> stated that T.M. backups would just continue to accumulate as normal.   Does 
> this hold true with Mountain Lion?

I upgraded from Lion to Mountain Lion but I'm fairly sure it is the same from 
SL to ML.
Time Machine indicates that oldest backup & latest back is "none' until after 
it completes the first full backup.
If I remember correctly it took some moments after the first backup before it 
changed to oldest backup date and latest backup.
> 
> The last step in "Ronni's tutorial" is to let Time Machine complete a full 
> backup.   Does this mean it will not be a normal incremental backup, but a 
> new backupdb?

It takes longer as it gives the impression of a full backup as it is a new 
operating system (upgrade) and needs to check all files and changes to the 
system, but it will carry on from your previous backup.
> 
> A simulated Restore from Time Machine in Mountain Lion seems to show the 
> history of Snow Leopard backups, so the data is presumably still accessible. 

Don't touch it; just let Time Machine do its job. Don't interrupt the first 
backup, let it complete the backup. I quit all applications an just let TM do 
its first backup.

Cheers,
Ronni
> 
> (The 4 GB OS X download was fine - but then another 3 GB of App upgrades was 
> too much!)
> 
> Regards, Alan
> 
> Alan Smith
> iMac 21.5" Intel Core 2 Duo 3.06GHz 12G RAM - OSX 10.8
> iPad2; ATV2
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
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