Test this out with flashback and let me know how it works.

http://s000.tinyupload.com/?file_id=41391192522496471504

Thanks a lot. I will test immediately.
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Nvram is working correctly and Msr is unlocked. Now i will try to install Big Sur. I will post the results. 👌👌🤓
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You just saved my life man! Thank you very much. It works great. No issues right now. I have successfully installed Big Sur to my Asus X99-E WS without any issue.

I will test XMP settings after setup then i will post here again.

I appreciate you.

@dragonsun252
I'll try tomorrow but from what motionworks says I can only thank you once again for the precious help!

@dragonsun252 - Nice to see! Thanks for jumping in to help when and where you can, always appreciated!!

I confirm everything is working perfectly! Thanks again to @dragonsun252 and @Lost_N_BIOS
Have a nice holiday season! :)

tests carried out, everything works perfectly! Thanks again!
Merry Christmas

Hi. Any chance to have x99-a bios patched for big sur? Actually any link to a guide will be very appreciated. Thank you guy's

@motionworks @redlyon @ ALL - Merry Christmas, Happy Holidays, and I hope you all have a great New Year!!

@seevolas - Info on page one, but not sure there is a guide anywhere on how to do the actual editing. What BIOS version do you need edited?

@dragonsun252 - Will you do this x99-a edit for seevolas, or do you want me to get it? Thanks

I need to patch Native NVRAM. On ASUS X99-a 4101

I manage to update microcode and unlock MSR =xE2 But had no luck with native NVRAM

I tried with coderush Uefi Patch and always get an error.

There is a lot of people out there (Me included) with x99 systems blocked in stage two reboot loop of osx 10.16 install. And I would like to find a way to help myself and others.

That's why I'M looking for a guide to patch NVRAM

@seevolas - Extract BIOS Body from capsule (How to here, except at #2 you do your edits instead of NVME edit)
Patch info is in post #2 - Search via hex with UEFITool to find location to edit (in your BIOS case = 54B070F3-9EB8-47CC-ADAF-39029C853CBB / NVRAMSMIDXE)
Use UEFITool 25.0 and extract target PE32 module from found locations (Suggest extract/replace via Body - example image below), do edit via hex, then replace edited module back into BIOS same way you extracted with UEFITool 25.0.
Then put modified BIOS body back into capsule per method linked above via hex, and save as USB Flashback name.

I will do for you if DragonSun252 does not want to do, once he replies back.

Extract/replace PE32 BODY w/ UEFITool. This is random example in image below, this is NOT your BIOS or the module you should be editing
I also did the extract here with UEFITool NE Alpha 51, you can use 25.0 to extract and replace, this is only a general example I made to show someone how I do this kind of extract/replace

@seevolas , Coderushes Patch is hit or miss and it often requires a manual edit. I can make one for most X99 ASUS Boards at this point and will also be posting them along with flashing instructions on my website and here on the forums. As for instructions on how to mod it. @Lost_N_BIOS posted the basics off it. It's hard to convey and teach this but it requires a lot of background knowledge. If there are sections of his quick guide that make you lost there are many more extensive guides on here for edition a BIOS :).

Also, I want to confirm that you do not have USB 3.1.

@seevolas
Here is an X99-A Mod with MSR and NVME Patched.
http://s000.tinyupload.com/?file_id=08367498153436312976

Here is an edited CodeRush patcher with my bad attempt to guide you. (I just downloaded and tested and it made one that matched mine)
Please be aware as it says in the guide the tool will mess up the Capsule header and that will need to be fixed (Included)
http://s000.tinyupload.com/?file_id=04146520364306350152

Thank you dragonsun252. In the last few days I manage to patch and flash my bios with msr, nvram and updated microcode. Sadly that did not work for osx 10.16 and I'm still blocked on second stage reboot loop. 10.15.7 works great anyway. I'm gonna keep working on it.
Again thank you very much for your help

@seevolas Did you try the bios linked above?

1 minute ago I manage to install big sur.
I flashed your bios and and tried lots of other things and I kept rebooting til for some kind of intuition formated the installation drive to macos extended journaled and to.my surprise it did the job. But still I need to repeat the process to understand exactly what happened.
Your version of uefi patch is exactly what I did a few days back. Of course I was not aware of the need of editing the bios .cap

Thank you very much.