I understand that, but this system has been working with Nvidia graphics for months, so I would guess the SMBIOS is not the problem here. Any other ideas on what could be causing graphics to not load with the 004 security update and up-to-date Nvidia web and CUDA drivers?You don't have to use the values of a real Mac for iMessage to work and really you shouldn't because it can cause iMessage and iCloud to stop working on both machines. On both of my hacks all values (MLB, UUID, serial number) are all generated values and I have had any issues with iMessage or iCloud since February 2015 when most people's started working.
You should use a smbios that best reflects your system. Commonly used ones are iMac14,2 and MacPro3,1. You shouldn't use MacPro4,1/5,1/6,1 or iMac15,1.
And again it brakes it. I´m on Yosemite but when i copy this in terminal "sudo kextcache -system-prelinked-kernel", after password i get this:
AppleIntelHD3000Graphics.kext has no Info.plist file.
AppleIntelHD4000Graphics.kext has no Info.plist file.
AppleIntelHD5000Graphics.kext has no Info.plist file.
AppleIntelHDGraphics.kext has no Info.plist file.
AppleIntelHDGraphicsFB.kext has no Info.plist file.
AppleIntelHD3000Graphics.kext has no Info.plist file.
AppleIntelHD4000Graphics.kext has no Info.plist file.
AppleIntelHD5000Graphics.kext has no Info.plist file.
AppleIntelHDGraphics.kext has no Info.plist file.
AppleIntelHDGraphicsFB.kext has no Info.plist file.
Can't update the system prelinked kernel during safe boot.
...i successfully changed my Nvidiastartup kexts plist to 14F1912. Now i guess i´m stuck in here- the last 2 terminal commands.