my D3100 on macOS lan problem
 

i use new macbook pro on macOS 10.12.1
installed DisplayLink Software Installer.pkg
reboot macOS and my lan show can't get DHCP

i ask apple support say is lan drive problem

i find lan info on system report

Dell USB3.0 Dock：

Type : USB
Name : en1
Kext name： AppleUSBNCM.kext
Position： /System/Library/Extensions/AppleUSBNCM.kext
version： 5.0.0

the driver kext is use appleusbncm.kext

i know this is wrong kext

DisplayLink LAN is use displaylinkethernetdriver.kext

but way installer not have displaylinkethernetdriver.kext on system?

My system Other kext only have

Cyrus$ ls /Library/Extensions/
ACS6x.kext DuetDisplay.kext
ATTOCelerityFC8.kext HighPointIOP.kext
ATTOExpressSASHBA2.kext HighPointRR.kext
ATTOExpressSASRAID2.kext PromiseSTEX.kext
ArcMSR.kext SoftRAID.kext
CalDigitHDProDrv.kext ufsd_NTFS.kext
DisplayLinkDriver.kext

Hi,

Our devices comply with the CDC NCM specification. This is a standard protocol for Ethernet devices over USB.
Operating systems can choose to have a standard USB class driver for each standard USB protocol. This is recommended as it reduces driver fragmentation.

Apple has introduced their CDC NCM class driver in El Capitan.
As a result since that version we no longer install our proprietary Ethernet driver for macOS.

So in short AppleUSBNCM.kext is the right driver and I'd agree with Apple that this may be a driver issue.
In any case the debugging should logically start with a debug version of the driver. If any issues are found on the device side we can assist Apple as we've done for other USB issues in the past.

It would be great if you could include our support e-mail in your follow up with Apple.

Regards,
Carlo