reddpen

Just to be sure, I verified the 0x432 value and it is showing 0x03 instead of 0x3. When I try to set it to 0x3, it sets itself to 0x03. Could this be the issue? Edit: I changed dvmt to 0x1 and 0x4 and both times it would not boot, so I guess 0x3 really is the sweet spot. Also I checked my BIOS, I'm on 1.12.3, downloaded from here.

I'm having the same issue with legacy ROM on and off. I'm on El Capitan 10.11.04 though. The bios is 1.12.something. I updated prior to starting the OS X install earlier today, so it's the latest available.

Yes, I did it following the instructions in the guide.

I've observed an issue on my E7270 that I can't find anything about online - when the display turns itself off and comes back on, it flickers and turns on and off. This happens when the screen goes to sleep from inactivity, or when the computer itself goes to sleep. The only way to make it act normal again is to reboot it. Has anyone seen this? Any idea where to start to fix this issue? Thank you!

Thank you for the quick reply! I could have sworn that Legacy Rom was disabled, but apparently it wasn't. I disabled it and ethernet fired right up! Now I just need to order a DW1560 and I'll be set.

After following the guides posted here, I managed to get a functional OS X 10.11.4 install on my E7270, however it does not have wifi or ethernet connectivity. After some googling, I found this: https://github.com/Mieze/IntelMausiEthernet I have an Intel I219-LM network adapter, but I am not sure how to install the drivers in the link above. Apologies if its a silly question, but I have very little experience with this. I did also read that Intel network cards are unsupported, but I'm more confused now since I found these drivers. Thanks!