aufa333 1 Posted December 12, 2020 Share Posted December 12, 2020 (edited) am trying to install big sur & i've read pretty much everywhere that x99 is out of luck with this release, but there also some lucky users who got it installed, so i was hoping if someone of the more experienced with opencore to tell where to look, or how to debug ? below is my current efi along with the debug log from OC, if you need more info plz ask, thanx. setup asus x99-a II Intel i7-5820K RX 590 iMac 1,1 OC v0.6.4 efi.rar Edited December 12, 2020 by aufa333 Link to post Share on other sites
dedeendium 3 Posted February 13 Share Posted February 13 X99 have problem with broken NVRAM on Big Sur, so on second stage will be always reboot. To make it work you need to bring u'r hardrive/ssd/nvme on another machine and install it in there. After that you just replace u'r opencore boot loader on u'r hardrive/ssd/nvme EFI and it wil work on x99 machine. Link to post Share on other sites
mickeyd453 31 Posted February 14 Share Posted February 14 or just install Catalina, get emulated nvram working and then perform an upgrade from Catalina to BS Link to post Share on other sites
xthunder 6 Posted February 16 Share Posted February 16 (edited) I just went through this - I ended up doing what @dedeendium suggested above - install and configure fully on another PC and install OC/EFI for X99-A II. You should be able to use what I posted in my thread since only difference is the GPU - RX590 should be supported out of box. Good luck~ Edited February 16 by xthunder Link to post Share on other sites
PPCnostalgic 123 Posted February 21 Share Posted February 21 Once the install has succeded on another machine if I bring back my SSD on my Ivy Bridge rig will it work with Clover as well or will Open Core be mandatory? Link to post Share on other sites
fitman 0 Posted March 10 Share Posted March 10 On 2/15/2021 at 4:57 AM, mickeyd453 said: or just install Catalina, get emulated nvram working and then perform an upgrade from Catalina to BS How I can check that I get the emulated nvram? I have a full function Catalina of my Asus X99-A-II Link to post Share on other sites
osx151212 10 Posted April 9 Share Posted April 9 (edited) Hello, have you followed the following instruction?https://dortania.github.io/OpenCore-Install-Guide/config.plist/haswell.html#platforminfo My understanding is that iMac15,1 is proper platform for your setup, info on i7-5820K cpu. osx151212 Edited April 9 by osx151212 Link to post Share on other sites
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