I even took out the memory and tried individual sticks, and reinserted the CPU, but still no joy! I've tried all the recommended things, such as resetting the cmos via both the button on the MB, along with the jumper and battery removal method, but to no avail.

However, after finally getting around to applying revised OC settings from the retailers technical team, it is now stuck in this boot loop after a BSOD during a burn test with Intel Burn Test. However, I've been having this problem from time to time with this board even at stock speeds, but it usually sorts itself out. (Intel i7 4790k, 16GB Team Group DDR3 2333mhz, Superflower LeadX 850w PSU). If you're on Big Sur or below, it's recommended to keep using iMac15,1.I got this board with a pre-overclocked bundle from a reputable UK retailer in mid 2015. You have to use iMac16,2 as the SMBIOS for Monterey to work. Lastly, the DevicesPropertises section, in PciRoot(0x0)/Pci(0x2,0x0) -> AAPL,ig-platform-id, put 04001204 if using a Dedicated GPU, or 0300220D if running off of iGPU only. Use the SMBIOS iMac15,1 if using a Dedicated GPU, or the SMBIOS iMac14,4 if running off of iGPU only. You have to add the MLB/ROM/UUID/Serial yourself. Use a proper plist editor (Like Xcode, PlistEdit Pro or ProperTree) to edit the ist file. Note: FeatureUnlock is now enabled in the EFI to enable Universal Control and other features. If you really want to, use FeatureUnlock. It can be force enabled but the result is unuseable. Sidecar doesn't work because the Processor/GPU doesn't support HEVC encode/decoding. Link to USBMap (Modification to the mentioned USBMap: removed HS10 port to accomodate Fenvi t919 usb header). USB is mapped properly, USB3/USB2 all ports are working. OC Settings > CPU Features - CFG Lock > Disabledīasically everything working including iMessage, Facetime, Airdrop, Handoff, Continuity, iTunes DRM (not TV+), Apple Watch Unlocking, Intel Quicksync.OC Settings > CPU Features - Intel VT-d > Disabled.Settings > Advanced > Integrated Graphics Configuration > IGD Multi-Monitor > Enabled (If running iGPU in Headless mode).Fenvi T919 Wireless for WiFi and Bluetooth.Intel i5-4690K Processor (Overclocked to 4.4Ghz, 1.23v).This is a fully working EFI for MSI Z97 macOS Big Sur (Current: 12 Beta 5) installation booted using Opencore.

Msi z97 gaming 7 processor