Hi Ronni Rob,
I've done what you suggested.
I've also deactivated all MAIL accounts through System Prefs Internet Accounts.
Unfortunately despite running Disk Doctor and restarting Notification Center NC 
remains incurable. And it's using 90% of the CPU.
So I then downloaded Sierra to a 1TB storage drive and ran with that. It's USB 
2 so very slow but no more issues with NC. I don't think my iMac has USB3.
Obviously I can't continue with this a the second slow boot drive for long.

Can you suggest a solution and a procedure such as wipe The Sierra system off 
my original boot drive with corrupted NC and reinstall or some way to just 
strip NC from that system?

Cheers again
Marcus
Sent from Marcus iPhone 5
> 
> On 11 Nov. 2016, at 11:25 am, Marcus F Harris <cryptodo...@me.com> wrote:
> 
> Last info
> 
> Sent from Marcus iPhone 5
> 
> Begin forwarded message:
> 
>> From: Ronni Brown <ro...@mac.com>
>> Date: 11 November 2016 at 6:30:15 am AWST
>> To: WAMUG <wamug@wamug.org.au>
>> Subject: Re: ERRATIC BEHAVIOUR OF NOTIFICATION CENTRE NC
>> Reply-To:wamug@wamug.org.au
>> 
>> Hi Marcus,
>> 
>> You could try to Rebuild your Mail Inbox:
>> 1. Launch Mail.app
>> 2. Under Mailboxes in left column -Inbox select/highlight your Account 
>> 3. In Menu Bar - Mailbox > choose “Rebuild”
>> 
>> This rebuild process can take a few minutes, or even an hour or more 
>> depending on how large your inbox and sent messages folders are.
>> 
>> An important note: this may cause significant bandwidth use for mailboxes 
>> configured with IMAP or Exchange, because the locally stored messages are 
>> removed and then redownloaded from the remote mail server.
>> 
>> If that doesn’t solve the problem:
>> 1. Quit Mail 
>> 2. Go to ~/Library/ Mail/V4/MailData and drag the files Envelope Index, 
>> Envelope Index- shm, and Envelope Index-wal to the Trash. 
>> 3. When you launch Mail again, it’ll tell you that you need to “import” all 
>> your messages (just as it may have done when you upgraded to Sierra). 
>> Let it do so—it’s recreating your envelope index from scratch, but don’t 
>> worry, you won’t lose any messages, labels, message status, or other data.
>> 
>> 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 11 Nov. 2016, at 12:06 am, Rob Phillips <r.phill...@iinet.net.au> wrote:
>>> 
>>> Hi Marcus
>>> I like the way you're doing your troubleshooting. Very systematic. I don't 
>>> use Mail myself, but it could be that the Mail database is corrupt. Google 
>>> this, and see what you need to do to repair the database.
>>> 
>>> Cheers
>>> Rob
>>> 
>>> On 10/11/2016 9:31 pm, Marcus F Harris wrote:
>>>> Hi Rob and Ronni,
>>>> I ran Disk Doctor on my WD Time Machine backup disc.
>>>> Although it’s overloaded it seems OK.
>>>> Here is the resulting test message.
>>>> DiskDoctor
>>>> Repairing file system.
>>>> Checking Journaled HFS Plus volume.
>>>> Checking extents overflow file.
>>>> Checking catalog file.
>>>> Checking multi-linked files.
>>>> Checking catalog hierarchy.
>>>> Checking extended attributes file.
>>>> Checking multi-linked directories.
>>>> Checking volume bitmap.
>>>> Checking volume information.
>>>> The volume My TIME MACHINE appears to be OK.
>>>> File system check exit code is 0.
>>>> Updating boot support partitions for the volume as required.
>>>> Operation successful.
>>>> 
>>>> Anyway I ejected the backup disc and disconnected it from the iMac. [I 
>>>> have ordered a 4TB Mac formatted WD backup disc. Meanwhile I will save 
>>>> important docs to thumbdrives.]
>>>> 
>>>> Activity Monitor read NC as using 0.1%CPU and it opened and closed 
>>>> correctly until I commenced using MAIL.
>>>> So, ten minutes later it’s doing it again. 90% CPU, 600MB Memory, but 
>>>> refusing to respond.
>>>> Ten minutes later, the MAIL alerts appear again.
>>>> I have turned off Safari and with no web browser running NC is non 
>>>> responsive.
>>>> It’s Gotta be MAIL thay’s causing this.
>>>> I have to delete most of my INBOX and maybe the ARCHIVE.
>>>> OR Should I uninstall MAIL and reinstall it?
>>>> How to do this efficiently is my new question?
>>>> Cheers
>>>> Marcus
>>>> 
>>>>> On 9 Nov. 2016, at 7:16 pm, Rob Phillips <r.phill...@iinet.net.au> wrote:
>>>>> 
>>>>> HI Marcus
>>>>> Just a quick reply which may save guru Ronni some time. :-)
>>>>> 
>>>>> You don't need a Time Capsule to run Time Machine (if I understood you 
>>>>> correctly)
>>>>> Backing up lots of files to                                 Dropbox may 
>>>>> be OK in Singapore, but it isn't really an option in poor old Australia...
>>>>> I suspect that your backup disk (time machine or time capsule) may be 
>>>>> having some problems. Look in Applications/ Utilities to find Disk 
>>>>> Utility. Do a 'Repair Disk' on your backup drive and see what it says...
>>>>> If you buy a new external backup disk, you can certainly reformat it. 
>>>>> Disk Utility is once again your friend.
>>>>> Cheers
>>>>> Rob
>>>>> 
>>>>> On 9/11/2016 6:34 pm, Marcus F Harris wrote:
>>>>>> Hi Ronni, An update.
>>>>>> 
>>>>>> I deleted the issues you quoted from EtreCheck System report.
>>>>>> 
>>>>>> Then I ran it again and it redlines the backup WD Time Machine as not 
>>>>>> large enough.
>>>>>> This may well be an issue.
>>>>>> 
>>>>>> I went to buy another Time Machine, but the locals only had outdated 
>>>>>> models formated for PC  in stock.
>>>>>> Another issue maybe transfering files to DROPBOX. I mean the web product 
>>>>>> Dropbox, Inc.
>>>>>> This is a continuous process as is Backup.
>>>>>> 
>>>>>> Anyway, it takes some time…minutes before NC appears and then it refuses 
>>>>>> to respond.
>>>>>> 
>>>>>> I checked Activity Monitor and it stated NC was using 90% of CPU until 
>>>>>> all the Alerts appear and then +/- % CPU until I try to delete the 
>>>>>> Alerts then it’s Back to 90%.
>>>>>> I saved the Activity Monitor Stats if that’s any use.
>>>>>> 
>>>>>> I’m still thinking it could be a MAIL conflict.
>>>>>> 
>>>>>> When I log out and log in to my other Account, I have no trouble with 
>>>>>> Sierra or NC. There’s only 10 emails and no Backup or Dropbox on that 
>>>>>> account
>>>>>> 
>>>>>> Oh well, I will get another Time Machine HDrive and see if that sorts it 
>>>>>> out.
>>>>>> 
>>>>>> Do you think WD or Seagate are ok reformatted?
>>>>>> 
>>>>>> Cheers for now
>>>>>> 
>>>>>> Marcus
>>>>>> 
>>>>>>> Begin forwarded message:
>>>>>>> 
>>>>>>> From: Marcus F Harris <cryptodo...@me.com>
>>>>>>> Subject: Re: ERRATIC BEHAVIOUR OF NOTIFICATION CENTRE NC
>>>>>>> Date: 8 November 2016 at 9:55:56 am AWST
>>>>>>> To: wamug@wamug.org.au
>>>>>>> 
>>>>>>> Dear Ronni,
>>>>>>> You have certainly given me a lot of great advice.
>>>>>>> I'm going to follow it carefully, but it will take me a few days. 
>>>>>>> I will report back when done.
>>>>>>> Thanks so much
>>>>>>> Marcus
>>>>>>> 
>>>>>>> Sent from Marcus iPhone 5
>>>>>>> 
>>>>>>> On 6 Nov. 2016, at 10:50 pm, Ronni Brown <ro...@mac.com> wrote:
>>>>>>> 
>>>>>>>> Ok Marcus,
>>>>>>>> I’ve had a look at your EtreCheck system report. The items that stand 
>>>>>>>> out I’ve indicated below.
>>>>>>>> I also feel you need to check all your applications especially third 
>>>>>>>> party apps & plugins for updates.
>>>>>>>> 
>>>>>>>>  CS2 applications were written for the PowerPC processors that ran 
>>>>>>>> older Macs. 
>>>>>>>> The last version of Mac OS X to run PowerPC software was OS X 10.6.8 
>>>>>>>> Snow Leopard.
>>>>>>>> 
>>>>>>>> There is no way to run Adobe CS2 software on macOS 10.12 Sierra. The 
>>>>>>>> only option is to use a newer version of the software.
>>>>>>>> Startup Items: ⓘ
>>>>>>>>     AdobeVersionCueCS2: Path: /Library/StartupItems/AdobeVersionCueCS2
>>>>>>>>     TuxeraNTFSUnmountHelper: Path: 
>>>>>>>> /Library/StartupItems/TuxeraNTFSUnmountHelper
>>>>>>>>     Startup items no longer function in OS X Yosemite or later
>>>>>>>> 
>>>>>>>> Uninstall these startup items - Startup items are obsolete since OS X 
>>>>>>>> Yosemite
>>>>>>>> 
>>>>>>>> Launch Agents: ⓘ
>>>>>>>>   [not loaded]    net.culater.SIMBL.Agent.plist (2016-03-25) [Support]
>>>>>>>> 
>>>>>>>> SIMBL needs to be uninstalled - EasySIMBL does not work anymore 
>>>>>>>> because of the System Integrity Protection introduced in El Capitan
>>>>>>>> 
>>>>>>>> Time Machine:
>>>>>>>>   Size of backup disk: Too small
>>>>>>>>             Backup size 1.00 TB                                        
>>>>>>>>          < (Disk used 350.63 GB X 3)
>>>>>>>> 
>>>>>>>> Your iMac’s Macintosh HD is 2TB size and you are backing up to a 1TB 
>>>>>>>> size drive.
>>>>>>>> Your Time Machine backup Drive should be at least 2 times the size of 
>>>>>>>> all the data you are backing up.
>>>>>>>> 
>>>>>>>> Time Machine requires that your destination volume have, as a bare 
>>>>>>>> minimum, 2 times the space occupied by the data you’re backing up. 
>>>>>>>> (That gives some extra space to store multiple versions of at least 
>>>>>>>> some files.) 
>>>>>>>> So, as a first pass, multiply the “Used” value you see in the Get Info 
>>>>>>>> window by 2 to find out the smallest partition size Time Machine can 
>>>>>>>> use.
>>>>>>>> 
>>>>>>>> You’ll be far better off setting aside 3 times the amount of space 
>>>>>>>> used on your disk for backups. 
>>>>>>>> 
>>>>>>>> The reason is simple: the more space Time Machine has to work with on 
>>>>>>>> the destination drive, the more backups it can store—and the farther 
>>>>>>>> back in time you can reach when you restore data.
>>>>>>>> 
>>>>>>>> My Time Machine backup of my MacBook Pro 1TB HD is to a 3TB Time 
>>>>>>>> Capsule drive and the backups go back to January 2012
>>>>>>>> —
>>>>>>>> Click the [Support] links for help with non-Apple products.
>>>>>>>> Click the [Details] links for more information about that line.
>>>>>>>> 
>>>>>>>> Diagnostics Information: ⓘ
>>>>>>>> Click the [Details] for more information especially the 
>>>>>>>> NotificationCenter lines (the details will only show on your Mac not 
>>>>>>>> mine)
>>>>>>>> NotificationCenter_2016-11-06-124035_[redacted].cpu_resource.diag 
>>>>>>>> [Details]
>>>>>>>> 
>>>>>>>> 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 6 Nov. 2016, at 8:34 pm, Marcus F Harris <cryptodo...@me.com> 
>>>>>>>>> wrote:
>>>>>>>>> 
>> 
>> 
>> -- 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>

Sent from Marcus iPhone 5

Begin forwarded message:

> From: Marcus F Harris <cryptodo...@me.com>
> Date: 14 November 2016 at 8:18:04 pm AWST
> To: Caroline Woo Harris <fergulb...@gmail.com>
> Subject: Re: ERRATIC BEHAVIOUR OF NOTIFICATION CENTRE NC
> 
> Hi Ronni Rob,
> I've done what you suggested.
> I've also deactivated all MAIL accounts through System Prefs Internet 
> Accounts.
> Unfortunately despite running Disk Doctor and restarting Notification Center 
> NC remains incurable. And it's using 90% of the CPU.
> So I then downloaded Sierra to a 1TB storage drive and ran with that. It's 
> USB 2 so very slow but no more issues with NC. I don't think my iMac has USB3.
> Obviously I can't continue with this a the second slow boot drive for long.
> 
> Can you suggest a solution and a procedure such as wipe The Sierra system off 
> my original the boot drive with corrupted NC and reinstall or some way to 
> just strip NC from that system?
> 
> Cheers again
> Marcus
> Sent from Marcus iPhone 5
>> 
>> On 11 Nov. 2016, at 11:25 am, Marcus F Harris <cryptodo...@me.com> wrote:
>> 
>> Last info
>> 
>> Sent from Marcus iPhone 5
>> 
>> Begin forwarded message:
>> 
>>> From: Ronni Brown <ro...@mac.com>
>>> Date: 11 November 2016 at 6:30:15 am AWST
>>> To: WAMUG <wamug@wamug.org.au>
>>> Subject: Re: ERRATIC BEHAVIOUR OF NOTIFICATION CENTRE NC
>>> Reply-To: wamug@wamug.org.au
>>> 
>>> Hi Marcus,
>>> 
>>> You could try to Rebuild your Mail Inbox:
>>> 1. Launch Mail.app
>>> 2. Under Mailboxes in left column -Inbox select/highlight your Account 
>>> 3. In Menu Bar - Mailbox > choose “Rebuild”
>>> 
>>> This rebuild process can take a few minutes, or even an hour or more 
>>> depending on how large your inbox and sent messages folders are.
>>> 
>>> An important note: this may cause significant bandwidth use for mailboxes 
>>> configured with IMAP or Exchange, because the locally stored messages are 
>>> removed and then redownloaded from the remote mail server.
>>> 
>>> If that doesn’t solve the problem:
>>> 1. Quit Mail 
>>> 2. Go to ~/Library/ Mail/V4/MailData and drag the files Envelope Index, 
>>> Envelope Index- shm, and Envelope Index-wal to the Trash. 
>>> 3. When you launch Mail again, it’ll tell you that you need to “import” all 
>>> your messages (just as it may have done when you upgraded to Sierra). 
>>> Let it do so—it’s recreating your envelope index from scratch, but don’t 
>>> worry, you won’t lose any messages, labels, message status, or other data.
>>> 
>>> 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 11 Nov. 2016, at 12:06 am, Rob Phillips <r.phill...@iinet.net.au> wrote:
>>>> 
>>>> Hi Marcus
>>>> I like the way you're doing your troubleshooting. Very systematic. I don't 
>>>> use Mail myself, but it could be that the Mail database is corrupt. Google 
>>>> this, and see what you need to do to repair the database.
>>>> 
>>>> Cheers
>>>> Rob
>>>> 
>>>>> On 10/11/2016 9:31 pm, Marcus F Harris wrote:
>>>>> Hi Rob and Ronni,
>>>>> I ran Disk Doctor on my WD Time Machine backup disc.
>>>>> Although it’s overloaded it seems OK.
>>>>> Here is the resulting test message.
>>>>> DiskDoctor
>>>>> Repairing file system.
>>>>> Checking Journaled HFS Plus volume.
>>>>> Checking extents overflow file.
>>>>> Checking catalog file.
>>>>> Checking multi-linked files.
>>>>> Checking catalog hierarchy.
>>>>> Checking extended attributes file.
>>>>> Checking multi-linked directories.
>>>>> Checking volume bitmap.
>>>>> Checking volume information.
>>>>> The volume My TIME MACHINE appears to be OK.
>>>>> File system check exit code is 0.
>>>>> Updating boot support partitions for the volume as required.
>>>>> Operation successful.
>>>>> 
>>>>> Anyway I ejected the backup disc and disconnected it from the iMac. [I 
>>>>> have ordered a 4TB Mac formatted WD backup disc. Meanwhile I will save 
>>>>> important docs to thumbdrives.]
>>>>> 
>>>>> Activity Monitor read NC as using 0.1%CPU and it opened and closed 
>>>>> correctly until I commenced using MAIL.
>>>>> So, ten minutes later it’s doing it again. 90% CPU, 600MB Memory, but 
>>>>> refusing to respond.
>>>>> Ten minutes later, the MAIL alerts appear again.
>>>>> I have turned off Safari and with no web browser running NC is non 
>>>>> responsive.
>>>>> It’s Gotta be MAIL thay’s causing this.
>>>>> I have to delete most of my INBOX and maybe the ARCHIVE.
>>>>> OR Should I uninstall MAIL and reinstall it?
>>>>> How to do this efficiently is my new question?
>>>>> Cheers
>>>>> Marcus
>>>>> 
>>>>>> On 9 Nov. 2016, at 7:16 pm, Rob Phillips <r.phill...@iinet.net.au> wrote:
>>>>>> 
>>>>>> HI Marcus
>>>>>> Just a quick reply which may save guru Ronni some time. :-)
>>>>>> 
>>>>>> You don't need a Time Capsule to run Time Machine (if I understood you 
>>>>>> correctly)
>>>>>> Backing up lots of files to Dropbox may be OK in Singapore, but it isn't 
>>>>>> really an option in poor old Australia...
>>>>>> I suspect that your backup disk (time machine or time capsule) may be 
>>>>>> having some problems. Look in Applications/ Utilities to find Disk 
>>>>>> Utility. Do a 'Repair Disk' on your backup drive and see what it says...
>>>>>> If you buy a new external backup disk, you can certainly reformat it. 
>>>>>> Disk Utility is once again your friend.
>>>>>> Cheers
>>>>>> Rob
>>>>>> 
>>>>>>> On 9/11/2016 6:34 pm, Marcus F Harris wrote:
>>>>>>> Hi Ronni, An update.
>>>>>>> 
>>>>>>> I deleted the issues you quoted from EtreCheck System report.
>>>>>>> 
>>>>>>> Then I ran it again and it redlines the backup WD Time Machine as not 
>>>>>>> large enough.
>>>>>>> This may well be an issue.
>>>>>>> 
>>>>>>> I went to buy another Time Machine, but the locals only had outdated 
>>>>>>> models formated for PC  in stock.
>>>>>>> Another issue maybe transfering files to DROPBOX. I mean the web 
>>>>>>> product Dropbox, Inc.
>>>>>>> This is a continuous process as is Backup.
>>>>>>> 
>>>>>>> Anyway, it takes some time…minutes before NC appears and then it 
>>>>>>> refuses to respond.
>>>>>>> 
>>>>>>> I checked Activity Monitor and it stated NC was using 90% of CPU until 
>>>>>>> all the Alerts appear and then +/- % CPU until I try to delete the 
>>>>>>> Alerts then it’s Back to 90%.
>>>>>>> I saved the Activity Monitor Stats if that’s any use.
>>>>>>> 
>>>>>>> I’m still thinking it could be a MAIL conflict.
>>>>>>> 
>>>>>>> When I log out and log in to my other Account, I have no trouble with 
>>>>>>> Sierra or NC. There’s only 10 emails and no Backup or Dropbox on that 
>>>>>>> account
>>>>>>> 
>>>>>>> Oh well, I will get another Time Machine HDrive and see if that sorts 
>>>>>>> it out.
>>>>>>> 
>>>>>>> Do you think WD or Seagate are ok reformatted?
>>>>>>> 
>>>>>>> Cheers for now
>>>>>>> 
>>>>>>> Marcus
>>>>>>> 
>>>>>>>> Begin forwarded message:
>>>>>>>> 
>>>>>>>> From: Marcus F Harris <cryptodo...@me.com>
>>>>>>>> Subject: Re: ERRATIC BEHAVIOUR OF NOTIFICATION CENTRE NC
>>>>>>>> Date: 8 November 2016 at 9:55:56 am AWST
>>>>>>>> To: wamug@wamug.org.au
>>>>>>>> 
>>>>>>>> Dear Ronni,
>>>>>>>> You have certainly given me a lot of great advice.
>>>>>>>> I'm going to follow it carefully, but it will take me a few days. 
>>>>>>>> I will report back when done.
>>>>>>>> Thanks so much
>>>>>>>> Marcus
>>>>>>>> 
>>>>>>>> Sent from Marcus iPhone 5
>>>>>>>> 
>>>>>>>> On 6 Nov. 2016, at 10:50 pm, Ronni Brown <ro...@mac.com> wrote:
>>>>>>>> 
>>>>>>>>> Ok Marcus,
>>>>>>>>> I’ve had a look at your EtreCheck system report. The items that stand 
>>>>>>>>> out I’ve indicated below.
>>>>>>>>> I also feel you need to check all your applications especially third 
>>>>>>>>> party apps & plugins for updates.
>>>>>>>>> 
>>>>>>>>>  CS2 applications were written for the PowerPC processors that ran 
>>>>>>>>> older Macs. 
>>>>>>>>> The last version of Mac OS X to run PowerPC software was OS X 10.6.8 
>>>>>>>>> Snow Leopard.
>>>>>>>>> 
>>>>>>>>> There is no way to run Adobe CS2 software on macOS 10.12 Sierra. The 
>>>>>>>>> only option is to use a newer version of the software.
>>>>>>>>> Startup Items: ⓘ
>>>>>>>>>     AdobeVersionCueCS2: Path: /Library/StartupItems/AdobeVersionCueCS2
>>>>>>>>>     TuxeraNTFSUnmountHelper: Path: 
>>>>>>>>> /Library/StartupItems/TuxeraNTFSUnmountHelper
>>>>>>>>>     Startup items no longer function in OS X Yosemite or later
>>>>>>>>> 
>>>>>>>>> Uninstall these startup items - Startup items are obsolete since OS X 
>>>>>>>>> Yosemite
>>>>>>>>> 
>>>>>>>>> Launch Agents: ⓘ
>>>>>>>>>   [not loaded]    net.culater.SIMBL.Agent.plist (2016-03-25) [Support]
>>>>>>>>> 
>>>>>>>>> SIMBL needs to be uninstalled - EasySIMBL does not work anymore 
>>>>>>>>> because of the System Integrity Protection introduced in El Capitan
>>>>>>>>> 
>>>>>>>>> Time Machine:
>>>>>>>>>   Size of backup disk: Too small
>>>>>>>>>             Backup size 1.00 TB < (Disk used 350.63 GB X 3)
>>>>>>>>> 
>>>>>>>>> Your iMac’s Macintosh HD is 2TB size and you are backing up to a 1TB 
>>>>>>>>> size drive.
>>>>>>>>> Your Time Machine backup Drive should be at least 2 times the size of 
>>>>>>>>> all the data you are backing up.
>>>>>>>>> 
>>>>>>>>> Time Machine requires that your destination volume have, as a bare 
>>>>>>>>> minimum, 2 times the space occupied by the data you’re backing up. 
>>>>>>>>> (That gives some extra space to store multiple versions of at least 
>>>>>>>>> some files.) 
>>>>>>>>> So, as a first pass, multiply the “Used” value you see in the Get 
>>>>>>>>> Info window by 2 to find out the smallest partition size Time Machine 
>>>>>>>>> can use.
>>>>>>>>> 
>>>>>>>>> You’ll be far better off setting aside 3 times the amount of space 
>>>>>>>>> used on your disk for backups. 
>>>>>>>>> 
>>>>>>>>> The reason is simple: the more space Time Machine has to work with on 
>>>>>>>>> the destination drive, the more backups it can store—and the farther 
>>>>>>>>> back in time you can reach when you restore data.
>>>>>>>>> 
>>>>>>>>> My Time Machine backup of my MacBook Pro 1TB HD is to a 3TB Time 
>>>>>>>>> Capsule drive and the backups go back to January 2012
>>>>>>>>> —
>>>>>>>>> Click the [Support] links for help with non-Apple products.
>>>>>>>>> Click the [Details] links for more information about that line.
>>>>>>>>> 
>>>>>>>>> Diagnostics Information: ⓘ
>>>>>>>>> Click the [Details] for more information especially the 
>>>>>>>>> NotificationCenter lines (the details will only show on your Mac not 
>>>>>>>>> mine)
>>>>>>>>> NotificationCenter_2016-11-06-124035_[redacted].cpu_resource.diag 
>>>>>>>>> [Details]
>>>>>>>>> 
>>>>>>>>> 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 6 Nov. 2016, at 8:34 pm, Marcus F Harris <cryptodo...@me.com> 
>>>>>>>>>> wrote:
>>>>>>>>>> 
>>> 
>>> 
>>> -- 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>