

Turn your power off with the power switch.Open your terminal, and run sudo nvram boot-args='kext-dev-mode=1'There are four ways to troubleshoot this device try them in this order:.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'.

