[MlMt] High Sierra, APFS, Time Machine, and MailMate...

Steven M. Bellovin smb at cs.columbia.edu
Sun Dec 10 22:02:54 EST 2017

         --Steve Bellovin, https://www.cs.columbia.edu/~smb

On 10 Dec 2017, at 21:58, Steven M. Bellovin wrote:

> On 10 Dec 2017, at 21:31, Charlie Garrison wrote:
>> On 11 Dec 2017, at 13:14, Steven M. Bellovin wrote:
>>> Seems like an improbable subject line--but is anyone else who uses 
>>> MailMate on High Sierra/APFS suddenly having serious Time Machine 
>>> performance issues? I am, on two different laptops. An iMac, which 
>>> has a hard drive and hence HFS+, is not having any trouble.
>> Time Machine is working normally for me.
>> You didn’t see what your Time Machine destination is. That would be 
>> my first suspect.
> I see it to two different external USB disks and to an USB drive 
> connected to an Airport. This is two different machines; both show the 
> problem going to either of their destinations. On the newer laptop, 
> the disk (and the hub it's normally plugged into, via a Thunderbolt 
> dock) is USB-3; the older laptop is USB-2 only.
I should add: the issue is not bandwidth to the disk--it works fine when 
backing up very large files.

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