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Sophos preventing Time Machine backup in Sierra

Since I upgraded to OS Sierra my time machine has been stuck in "preparing backup" but it never actually does the backup when using the Airport Time Capsule. My second Mac with Sierra backs up fine, but it does not have Sophos on it.

I Stoped Sophos an the backup started immediately.

appears to be a bug.

[locked by: FloSupport at 10:08 PM (GMT -8) on 26 Feb 2019]

0 Chris Micklethwaite over 7 years ago

I also have this problem on Macbook Pro and iMac 27" since upgrading to Sierra.

TM was permanently stuck in 'preparing backup'. I have completely removed Sophos and everything's working again.

Note: My Airport Time Capsule, NAS and other network attached drives were excluded
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0 Ross Walker over 7 years ago

I've removed Sophos and still my TM are stuck at 1.18TB / 11 hours remaining. Tried a new TM disk/backup, same result.

TM was working fine before Sophos :(

In my case I had MacOS Sierra already installed, then got Sophos and then TM broke.

EDIT: As of last night my second TM backup (normally kept off-site) was stuck at 1.18TB... but now I see this morning about 10 min ago the progress started up again to 1.21TB completed. So there is progress being made after removal of Sophos.
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0 Aditya Patel over 7 years ago in reply to Ross Walker

HI Ross ,

We are currently working on the issue Time Machine , as for now Could you run the command and check if it works out for you

sudo sysctl debug.lowpri_throttle_enabled=0

Thanks and Regards

Aditya Patel

Regards,

Aditya Patel
Global Escalation Support Engineer | Sophos Technical Support
Knowledge Base | @SophosSupport | Sign up for SMS Alerts
If a post solves your question use the 'This helped me' link.
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0 ITGiwog over 7 years ago in reply to Aditya Patel

We have the same problem ...

when can we hope for an solution ?
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0 Ross Walker over 7 years ago in reply to Aditya Patel

Thanks - I did see that command online elsewhere as well - but TM eventually completed and is running ok now following removal of Sophos.
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0 Aditya Patel over 7 years ago in reply to Ross Walker

Hi All,

You may expect the Solution out by the end of this month

Thanks and Regards

Aditya Patel | Network and Security Engineer.

Regards,

Aditya Patel
Global Escalation Support Engineer | Sophos Technical Support
Knowledge Base | @SophosSupport | Sign up for SMS Alerts
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0 David Sparkes over 7 years ago in reply to Aditya Patel

Do expect the solution tomorrow 31 Oct 2016
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0 albert schweizer over 7 years ago

Hi all

I have a simillar problem. After upgrading to sierra, my Time Machine backup is not starting properly (no progress in preparing backup). What I figured out is, if I switch of the on-access scanner, time machine works fine. as soon as I switch on the on-access scanner the problem returns.So I can now decide to either do manual started backups from tome to time by switching of the on-access scanner or leave that scanner permanently disabled and have a security risk. Both options represent a problem for me. Quick help on this topic is appreciated...
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0 David Sparkes over 7 years ago in reply to Aditya Patel

I guess we have to wait another month?
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0 Ross Walker over 7 years ago in reply to David Sparkes

Remove Sophos and move on (assuming you are not stuck in a corporate environment). Avast seems ok so far.

Best of luck everyone - unsubscribing!
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