gerbilok posted a question in OS X Yosemite 10.10GTX550Ti not working and Realtek 8111E NIC not working I've just installed Niresh Yosemite 10.10.1 on my AMD based machine and while it does boot, I've been having many issues with regards to the graphics and networking. OSX doesn't seem to be able to pick up my Realtek PCI-E GbLAN controller 8111E so I can't get online to download any kexts or any utilities I need to complete the installation. Also, I repeatedly get the error "Graphics problem detected" whenever I open Finder or any other window. Once that error shows, it will cease to load any window. The screen will occasionally go black and I'll be dumped back to the login screen. No graphics problems appear when booting into Safe Mode. Any ideas?