Jump to content



Member Since 27 Mar 2012
Offline Last Active Today, 05:58 AM

Topics I've Started

IntelMausiEthernet.kext for Intel onboard LAN

31 January 2015 - 12:26 AM

This project is dedicated to the memory of Mausi, the cat I loved more than anybody else.


Attached File  Mausi.jpg   51.12KB   70 downloads


A few days before Christmas I started my latest project, a new driver for recent Intel onboard LAN controllers. My intention was not to replace hnak's AppleIntelE1000e.kext completely but to deliver best performance and stability on recent hardware. That's why I dropped support for a number of older NICs. Currently the driver supports:


5 Series

  • 82578LM
  • 82578LC
  • 82578DM
  • 82578DC

6 and 7 Series

  • 82579LM
  • 82579V

8 and 9 Series

  • I217LM
  • I217V
  • I218LM
  • I218V
  • I218LM2
  • I218V2
  • I218LM3

Key Features of the Driver

  • Support for multisegment packets relieving the network stack of unnecessary copy operations when assembling packets for transmission.
  • No-copy receive and transmit. Only small packets are copied on reception because creating a copy is more efficient than allocating a new buffer.
  • TCP, UDP and IPv4 checksum offload (receive and transmit).
  • Support for TCP/IPv6 and UDP/IPv6 checksum offload.
  • Makes use of the chip's TCP Segmentation Offload (TSO) feature with IPv4 and IPv6 in order to reduce CPU load while sending large amounts of data.
  • Fully optimized for Yosemite and Mavericks (64bit architecture) but should work with Mountain Lion and Lion too, provided you build from source with the 10.8 or 10.7 SDK.
  • Support for Energy Efficient Ethernet (EEE).
  • VLAN support is implemented but untested as I have no need for it.
  • The driver is published under GPLv2.

Current Status

  • The driver has been tested successfully with I217V, I218V and 82579V under 10.9.5, 10.10.1, 10.10.2 and 10.10.3.
  • The attached archive includes source code as well as a prebuilt binary (debug version) for Mavericks and Yosemite.

Known Issues

  • Some mainboards need a DSDT patch in order to work properly with the driver.
  • There seem to be problems while using VMware with version 1.x.x of the driver. In case you are affected use version 2.0.0 or newer.


  • Could you add support of for...? Well, you are probably asking me to add support for one of the older NICs like the 82571/2/3/4L or 82583 and the answer will be no as I dropped support for these chips intentionally. They are broken and I lost more than 2 weeks trying to make it work on the 82574L without success. I was asked to add support for I210, I211 and I350 but as these chips have a completely different architecture, which isn't supported by the underlying Linux driver, this is impossible, sorry.
  • Does it work with Snow Leopard or 32 bit kernels? No and I have no plans to make a version for 32 bit kernels or anything older than Lion.
  • Is TSO working stable? It took some time to make TSO support work the way it should but after successfully transferring a few 100GB with this driver I have reason to believe it works.


  1. Goto /S/L/E and delete AppleIntelE1000e.kext.
  2. Recreate the kernel cache.
  3. Open System Preferences and delete the corresponding network interface, e. g. en0.
  4. Reboot.
  5. Install the new driver and recreate the kernel cache. I recommend to use Kext Wizard or a similar utility for the installation.
  6. Reboot
  7. Open System Preferences again, select Network and check if the new network interface has been created automatically or create it manually now.
  8. Configure the interface.


  • Make sure you have followed the installation instructions especially when you have issues with certain domains while the others are working fine.
  • Use the debug version to collect log data when trying to track down problems. The kernel log messages can be retrieved with "grep kernel /var/log/system.log" in Terminal. Include the log data when asking for support or giving feedback. I'm an engineer, not a clairvoyant.
  • Don't copy and paste large amounts of log data to your post. Create an archive with the log data and attach it to your post. In case you don't want to make your log data publicly accessible, contact me via PM and I will provide you a mail address to send it directly to me. 
  • Check your BIOS settings. You might want to disable Network Boot and the UEFI Network Stack as these can interfere with the driver.
  • Double check that you have removed any AppleIntelE1000e.kext from your system because it could prevent the driver from working properly.
  • Delete the following files:
    • /Library/Preferences/SystemConfiguration/NetworkInterfaces.plist
    • /Library/Preferences/SystemConfiguration/preferences.plist
  • Verify your bootloader configuration, in particular the kernel flags. Avoid using npci=0x2000 or npci=0x3000. 
  • In Terminal run netstat -s in order to display network statistics. Carefully examine the data for any unusual activity like a high number of packets with bad IP header checksums, etc.
  • In case auto-configuration of the link layer connection doesn't work it might be necessary to select the medium manually in System Preferences under Network for the interface.
  • Use Wireshark to create a packet dump in order to collect diagnostic information.
  • Keep in mind that there are many manufacturers of network equipment. Although Ethernet is an IEEE standard, different implementations may show different behavior causing incompatibilities. In case you are having trouble try a different switch or a different cable.


  • Version 2.0.0 (2015-04-22)
    • First official release which is identical to 2.0.0d2 (only the version number has been changed).
  • Version 2.0.0d2 (2015-04-04)
    • Changed the tx descriptor write back policy for 82579, I217 and I218 to prevent random tx deadlocks.
  • Version 2.0.0d1 (2015-03-14)
    • Uses Apple's private driver interface introduced with 10.8.
    • Supports packet scheduling with QFQ
    • Solves the VMware issue.
  • Version 1.0.0d6 (2015-03-04)
    • Reworked TSO6 support to avoid problems with VMware.
    • Wake-on-LAN now working.
  • Version 1.0.0d5 (2015-02-27)
    • Reworked TSO4 support to eliminate the bug of 1.0.0d4.
    • Added some debug code in order to collect information about the VMware related issue.
  • Version 1.0.0d4 (2015-02-25)
    • Set total length field of the IP-header to zero for TSO4 operations.
    • Report EEE activation state in kernel log message when the link has been established.
  • Version 1.0.0d3 (2015-02-11)
    • Reworked media selection and EEE support (EEE is now activated when both link partners support it. It can be disabled selecting the medium manually).
    • Duplex setting for 10/100 MBit connections is now reported correctly.
    • The number of tx descriptors has been reduced from 2048 to 1024.
    • The code has been cleaned up and obsolete files have been removed.
  • Version 1.0.0d2 (2015-01-31)
    1. First development release.

Getting the Driver

Build from Source for 10.8

  1. ​Register as a developer on Apple's developer website. A free membership is sufficient.
  2. Download a copy of Xcode 5.1.1 and install it on your machine.
  3. In the project select 10.8 as the "Base SDK" and the "Deployment Target".
  4. Call "Archive" from the menu "Product" and save the built driver.


  • Thanks to RehabMan and Yung Raj for running tests and pointing me in the right direction while I was trying to fix TSO.
  • Special thanks to Yung Raj for motivating me when I was about to give up.
© 2015 InsanelyMac  |   News  |   Forum  |   Downloads  |   OSx86 Wiki  |   Mac Netbook  |   PHP hosting by CatN  |   Designed by Ed Gain  |   Logo by irfan  |   Privacy Policy