Hi Ronnie, thanks for that. I went through the process of turning off FileVault 
which took a while to decrypt the disc, then left to its own devices, this 
morning it has succesfully completed a backup with a time of 12:01 this 
morning. So it seems like it's sorted itself out. Thanks for the tips.

Regards


Pete

> On 8 Apr 2017, at 3:03 PM, Ronni Brown <[email protected]> wrote:
> 
> 
>> On 8 Apr 2017, at 9:36 am, Peter Crisp <[email protected]> wrote:
>> 
>> I did my updtae to Sierra 10.12.1 a couple of weeks ago and the MacBook (Pro 
>> Retina) and behavious of the MacBook was fine, nothing odd. I had TM turned 
>> OFF during the update and once the dust had settled, I turned it back on and 
>> after some time a ~5GB backup started and finished succesfully. 
>> 
>> Yesterday, I saw an Update showing in the App Store and so after a short 
>> review - I commenced the update which was to 10.12.4. 
>> 
>> Since then, my backups have been quite odd. I've notifications saying "can't 
>> locate the server", "you're trying to backup an encrypted disc to a non 
>> encrypted disc" and just now it was in the process of doing a backup - 
>> progress bar was showing for ~6GB backup - next time I came back to it it 
>> showed as though backup was all finished succesfully, however the panel 
>> indicated my last backup was June 2016!
>> 
>> I browsed a bit and noted also that autologin is disabled when FileVault is 
>> ON and I've normally had my MacBook set to autologin - and it has since 
>> moving to Sierra (12.4.1) reverted to reuquiring my login upon Start up - 
>> where prior configuration was Autologin was set ON.
>> 
>> Is this normal and any clues to maybe a simple setting I've not done which 
>> the update has changed for me? Is there a Sierra default configuration 
>> demanding FileVault ON and hence disabling Autologin and what is the 
>> connection with my backups behaviour if any?
> 
> Hi Peter,
> 
> That error message "you're trying to backup an encrypted disc to a non 
> encrypted disc" means that your 'Mac's hard drive is using FileVault 
> encryption to secure your data, but the hard drive you're using for Time 
> Machine is not encrypted.' 
> 
> Automatic login is disabled if your have FileVault enabled: 
> In System Preferences > Users & Groups > Login Options after enabling 
> FileVault, you’ll
> see that Automatic Login is set to Off and dimmed—you can’t enable it. 
> And, in System Preferences > Security & Privacy > General, the checkbox 
> labeled “Disable automatic login” disappears completely when you turn on 
> FileVault. This means you’ll always have to supply your password when you 
> turn on your Mac, restart, or log in.
> 
> You can read more about FileVault at the following links:
> 
> macOS Sierra: Encrypt the contents of your Mac with FileVault
> 
> macOS Sierra: Keep your Time Machine backup disk secure
> 
> 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 10.12.4
>> 
>> Regards
>> 
>> 
>> Pete
> 
> 
> 
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