Upgraded to 3.1.3 without reading release notes--oops.

[danb35]

My HaC Mini (a NUC8i7HNK) had been mostly-happily running Catalina (except for the occasional unexpected reboot) using hac-mini 2.17. But prompted by those reboots, I went ahead and upgraded to 3.1.3 without following the 3.0.1 release notes and resetting the NVRAM beforehand. Oops.

After doing the update, of course my system didn't boot any more. So, now looking at the release notes, I see that one of the fixes is to boot into the internal EFI shell and run fs0:\EFI\OC\OpenCore.efi. I ran that, whereupon I was greeted by a black screen--nothing at all there. So I rebooted, and entered the boot picker, where the only option was "Reset NVRAM", which I chose. The system rebooted into the same black screen; subsequent reboots into the boot picker again show only Reset NVRAM as an option.

The last option on the list in the release notes was to reset the BIOS, so I entered the BIOS menu and reset it to defaults, and then made the recommended changes (USB power, Thunderbolt, Secure Boot). No change. I then tried updating the BIOS (latest available, from May of this year), resetting again, once again making those changes. Again, no change.

Getting a little concerned now. Downloaded Catalina on my MacBook Pro, made a fresh USB of it using sudo "/Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia" --volume /Volumes/Installer, and installed 3.1.3 on that (checking the box for the boot menu). Take it to my NUC, and it will boot; the boot menu options are EFI, Install macOS Catalina, and Reset NVRAM. I don't see an option to boot from the existing internal SSD that already has Catalina on it.

If I launch Install macOS Catalina, and then go under the Apple menu to Select Startup Disk, the internal SSD is shown. If I go to Disk Utility, it's there as well. But it isn't showing up as a bootable device. What should my next steps be?

[osy]

Do you have one ssd installed or two? Can you see it in the startup utility in recovery mode?

[danb35]

I have only one SSD installed. If by "recovery mode" you mean when I boot into "install macOS Catalina" from the USB, and the startup utility is what comes up when I select "Startup Disk" from the Apple menu, yes, it comes up there.

Edit: I'm marking this as the answer, as I can't mark a reply to this comment as the answer. The solution is found in the comment by @x2358473 noting an apparent incompatibility between 3.1.3 and Catalina, and recommending use of 3.0.1.

[Medizinmann-MD]

Maybe this should be mentioned in the release notes!

[goodbest]

@danb35 @x2358473 @Przeblysk @fucongwanglucid @bosbode Do you enable the "SecureBoot" option for Hac-mini installer in Catalina? (I'm not mean the secure boot in BIOS)
If you do enable that, more config is needed in Hac Mini 3.1.x for Catalina. See link below.
If you do not enable SecureBoot in the installer, then report back first.

cc @osy
More detail in OC 0.7.2 (used in Hac-mini 3.1.x)
https://www.reddit.com/r/hackintosh/comments/owkrcn/psa_opencore_072_will_require_most_to_jump/
https://dortania.github.io/OpenCore-Post-Install/universal/security/applesecureboot.html#dmgloading

First off, the default minimum date and version required for APFS drivers to load has been bumped up to Big Sur. This means APFS drivers that come with High Sierra through Catalina won't load.

[danb35]

The only setting I changed from the default was to patch the installer when I created a new USB. I didn't change anything relating to secure boot or anything else.

[Przeblysk]

I'm sure I didn't open SecureBoot in the installer.The default installation option is used. @goodbest

[osy]

@goodbest Somehow I missed that comment, oof

[osy]

This should be fixed in v3.1.4