Hi Rick,

We do have logging in Sierra but it requires setting boot-args to enable.  This 
is generally only recommended for a development machine because you are 
required to disable system integrity protection.  If this is something you’re 
comfortable doing then I may be able to suggest some logging options for you.

The logging we have built in is largely component/functional area based so for 
example you can enable port logging to see connects/disconnects/enumerate for a 
specific port or all ports.  We also have logging for IOUSBHostDevice objects 
around their lifecycle, power transitions, and I/O path, etc.

What is it that you are hoping to discover with logging (what area do you need 
more information)?

—scott

> On Oct 22, 2017, at 4:30 PM, Rick Mann <[email protected]> wrote:
> 
> So, what's up with USB logging these days; I've been out of the game for a 
> while. It seems we can no longer use the USB logging tab of USB Prober (as 
> there's no current IOUSBFamily with logging support0?
> 
> I did find this: https://lists.apple.com/archives/usb/2015/Jan/msg00004.html
> 
> But what do we do today?
> 
> -- 
> Rick Mann
> [email protected]
> 
> 
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