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Much appreciated Maldon. Thank you sir!

Greetings Maldon! Using your appropriate Coffee Lake OC EFI, system boots successfully after Big Sur installation. Any assistance in further DSDT patching would be most appreciated. Thank you so much! Z390 Aorus Pro WIFI i7-8700k Radeon RX Vega 56 Big Sur 11.0.1 Opencore Send me Bigs-Mac-Pro.zip

Maldon, thank you for your patience. I figured out how to get this machine booting with OC using the boot install command on the installer drive. I've gone back to using the initial EFI in this post. I'm still booting to a black screen with the display staying on. I've tried DP, DVI and HDMI. I've also tried with -igfxvesa. Any thoughts? Thanks again.

Maldon, I've tried your Clover (Nehalem) EFI w/ Big Sur. Verbose completes to a black screen, however my monitor stays on. I have tried -igfxvesa, with the same result. Thanks.

Intel 5520. Many thanks.

Greetings Maldon! It's a stretch but I've wanted to upgrade this old beast from High Sierra (Clover) to Big Sur. Am hopeful that Opencore is possible, but cannot boot with this EFI. I have created the installer via USB-SSD and am trying to boot the Z600 off of the SSD via Sata or the internal slots. Any assistance and guidance would be most appreciated. Thank you very much! HP Z600 2 x X5650 (Westmere) RX570 Opencore Big Sur EFI.zip

Good evening sir.. the previous DSDT allows for shutdown in slightly less time than this most recent one. Any thoughts as to how I can speed up shutdown? Thank you!

Thank you very much, Maldon! System runs great.

Maldon, seems to have worked itself out after resetting nvram. Any assistance in DSDT patching would be most appreciated. Thank you so much! Send me Bigs-iMac-Pro.zip

Greetings Maldon! Attempting to upgrade with a fresh install of Big Sur. Implemented your Haswell EFI and managed to complete USB installation, however upon booting to the HD via USB, I am unsuccessful. Any assistance with this issue would be most appreciated. Thank you very much! Gigabyte Z97X-UD7-TH i7-4790K Integrated HD4600 Big Sur/Open Core IMG_7532.jpeg.zip

Same behaviour, but does not shut off for over 1 minute. Thanks for your patience.

Thanks again. Upon shutdown, system turns off, then on again without a display... then shuts off completely after 30 seconds.

Thanks very much, working well! System takes over 1 min to turn off after "Shut Down". Any thoughts?

Thanks very much Maldon! https://easyupload.io/sml8d3

Update- Upon updating all of the kexts, system seems to boot in normal time, and performance is greatly improved. Any "cleanup" you can suggest would be much appreciated. Thanks for your patience sir. https://u.pcloud.link/publink/show?code=XZL5lBXZoDX00IJzOJpHOc8eFevxnSpon93V

Hi Maldon.. thanks very much. It's getting closer. I can boot now, however IGPU Attempting many times, 3 minutes before log in, and graphics are very glitchy presently. Temporary freezing, hanging, etc. Thanks for your efforts here. Archive.zip

Thank you Maldon, both of these go to a black screen just before progress bar is complete. This system has 2 x DP out. I'm adapting with DP-HDMI cable. config.plist.zip

Greetings Maldon! I have extinguished my ideas as to how to get my internal HD530 working properly. Presently it's displaying 3MB. Any assistance in rectifying this issue would be most appreciated. Thank you very much. HP Prodesk 600-G2 (SFF) i5-6500 (HD530) Big Sur 11.0.1 OpenCore https://u.pcloud.link/publink/show?code=XZuLMBXZyA3pL4KFdGmEYxdpmhelxHSG8Uy7

Thanks very much Maldon!

Greetings Maldon! Just doing a fresh install on this old beast.. seems to running ok, however any DSDT patching you could do would be much appreciated. Thank you so much! Gigabyte GA-Z97X-Gaming 5 i7-4790K RX590 Big Sur 11.0.1 Open Core Send me Bigs-iMac-Pro.zip

Maldon, thanks for your efforts here.. I have not seen specific reference to it on these NUC's, however a few people have used the USB-c output on these units to drive a Thunderbolt display. I'm connecting via HDMI. What's strange is that it works perfectly if I plug the USB-c display in after boot up/log in. If it's connected prior to bootup, it's messed up. Apparently, with Windows, it works fine as a secondary display.

Greetings Maldon.. Initially the same issue existed with the USB-c display not working, however if I plug it in after the HDMI display has booted to the desktop, both displays seem to be working fine. Is there a way I can correct this so it boots normally with both monitors connected? Thanks so much.

Thanks for your patience Maldon. Do I add -igfxtypec to the previous agdpmod=vit9696 gfxonln=1 as well as the added config.list entries you've stated?

Hello Maldon.. presently the HDMI monitor goes to the log in screen and the HDMI-USB-c Monitor displays horizontal lines only. Then after a few seconds, both monitors go black.Thanks for your efforts. config.plist.zip

Thanks Maldon. That didn't do the trick. How do I go about "Changing Connectors". Thanks again.