Hey guys,
i got my NUC up and running with yosemite. i went for a clean install, wasn't to fussed about the files on there that i had. The problem was the unibeast v5.0.0, they have updated the unibeast to v5.0.1 and i used that and created the boot usb, that worked for me. well at first i thought it was the same old black screen but i waited for like 10 seconds and then i got the apple loading screen for the install.
Also i can stress enough that you have to have your DSDT as well witch is located in your USER>Extra's file. If everything was working for your NUC then with mavericks then that will make most of the things work. Straight off with the install i had my wifi and all other things working, i just had to use multi beast to install the DSDT and select:
Trim Enabler
NullCPUpowermanagement
Apple RTC patch for CMos reset
System Def: MacMini 5.1
1080p Display mode
GraphicsEnabler=YES