If you're in doubt, please make the decision that makes the most sense for your security concerns. This is a mild security risk, but it should be fine for most people. What step 5 does is instructs your computer to set itself to 'developer mode', which allows you to load unsigned kexts. As 'unsigned' drivers, Mac OS refuses to load them, saying they constitute a security hazard. The old drivers still work, no problem, but are being blocked in Yosemite because they aren't 'signed' properly, since they weren't re-issued for Yosemite. Open your terminal, and run sudo nvram boot-args='kext-dev-mode=1'.Download and install the drivers from the CD, kindly uploaded by this fine human being.Steps to get your adapter working on Mac OS 10.10 Yosemite They won't understand, but they will forgive you. Apologize to the people you care about for the things you've said over the past few hours.Hit the + button in the bottom right, select the 'USB 2.0 10/100M Ethernet Adapter', and hit add.Open System Preferences, and go to the Network Pane.Plug in your USB Adapter, with a live ethernet cable.Open your terminal, and run sudo kextload /System/Library/Extensions/USBCDCEthernet.kext.Once you're booted back up, download and install the drivers from the CD, kindly uploaded by this fine human being.Unplug your USB adapter, and reboot and give yourself a clean slate.Uninstall the dozens of other drivers you may have installed in the process of trying to get this working.Steps to get your adapter working if you've never used the adapter before in Mac OS 10.11 El Capitan. Definitely take a read down below to see what's changed in El Capitan, and if disabling SIP makes sense for your setup.When you boot back up, you'll have a working adapter!.From the top bar, select '', then 'Restart'.

From the top bar, select 'Utilities' and then 'Terminal'.Let go, and wait for your computer to boot into recovery mode. As soon as the screen goes black, hold down 'Command' and 'R' until you see a black screen with an Apple logo and a white progress bar. Steps to get your adapter working if you just upgraded to Mac OS 10.11 El Capitan. You're doing this on your own, and I assume no liability or warranty for what you do. It'll all be ok.Īs with all advice on the internet, you can't sue me if this sets fire to your cat or sends ninjas to your house. If you bought a cheap aftermarket USB-Ethernet adapter like me and found that it doesn't work on El Capitan or Yosemite, here's what you need to get it going. Update Oct 2015: Updated for 10.11 El Capitan!

Gigawire usb to ethernet mac