For educational purposes. I don't take any responsibility for you voilating the Apple ToS and/or damaging your device.

Add Serial, SystemUUID and MLB for SMBIOS iMac17,1

• CPU: i5-6500
• GPU: HD530
• RAM: 8GB
• Audio Codec: ALC221
• Model: HP EliteDesk 800 G2 SFF
• Mobo: Unknown / HP
• Ethernet: Intel I219LM

• Enable - VTd
• Enable - UEFI Boot Order
• Enable - Allow PCIe/PCI SERR# Interrupt
• Disable - VTx
• Disable - Everything in Security (TPM, SureStart etc.)
• Disable - SIntel Software Guard Extensions (SGX)
• Set - Video memory size 512MB
• Set - Legacy Support Enable and Secure Boot Disable

All 10 USB slots are usable, had to map four of the 3.0 to 2.0 for USB power-management though.

Front:

Back:

• Sleep
• VGA
• Front Audio I/O
• Dual Monitor (only outer port working atm)