I have a running Lenovo ThinkCentre m58 with El Capitan 10.11.6, that I want to share with you.
>>Hardware<<
CPU: 2,83 GHz Quad-Core Intel Xeon ( tested also with E8400 | E7500 )
RAM: 4GB up to 16GB ( tested without problems )
GPU: ATI Radeon HD 5450 1024MB ( dsdt injection, thx to "Jake Lo" )
LAN: Gigabit ( AppleIntelE1000e.kext )
Sound: VoodooHDA 2.8.8
>>Note<<
For the CPU-SSDT, just generate the cpu power management values and after you are safe to delete the NullPowerManagement.kext
Best of luck & a big thx to osxlatitude-Team!
EFI-lenovo-m58-HD5450.zip