On my iMac... I've tried modifying the Info.plist to include my boot ram version, and the model number, and nada, zilch, I still just have the same three checkboxes in BCA asking for Windows 7... WHY. I WANT WINDOWS 8.1 PLEASE, YES?! yargh. Tried using the "sudo codesign .... " terminal command as well. Do I actually need the entire Xcode program for this? Terminal seemed to download the tool needed and then says "replacing existing signature" and completes....buh?