- Nov 11, 2018
- Gigabyte Z490 Vision D
- RX 580
- Classic Mac
- Mobile Phone
Was going to try to upgrade from Mohave to Catalina, but couple of little bumps and then a brick wall. Followed @CaseySJ's Micro-Guide for Updgrading from Mojave to Catalina 10.15.4 and Newer.
No problem setting up and booting to a new EFI on a USB drive, copying and pasting RtVariables and SMBIOS sections from my old config.plist to the new (AMD) config file and using that. But when I boot to the new EFI my machine is now 18,1 (instead of 19,1) and has a new serial number, which as it turns out is a good serial number, and my old serial number, which I am pretty sure was good, is no longer any good. I also updated the BIOS from F8 to F9i, maybe that requires generating a new serial number? Opening the new config.plist file in Clover Configurator the SMBIOS pane is mostly blank, so maybe the config.plist file is messed up after the cutting and pasting.
But maybe the Mohave to Catalina upgrade path is no longer available anyway, when I go to update I am offered Big Sur of course. So if I want Catalina maybe the only path is a clean install and then Migration Assistant to bring everything over?
Please follow steps 1 and 2 as shown. Then steps 3 and 4 are optional, but recommended after Catalina has been fully installed, verified, and backed up. If you have more than one disk connected that contains an EFI folder, be sure to press F12 at BIOS Splash Screen to pick the right EFI disk.
- If you are using Clover Configurator to copy SMBIOS items from one EFI folder to another EFI folder, please do not do that. There's a problem in Clover Configurator when two EFI partitions are mounted; it gets confused between them.
- So Run Hackintool to see the current serial number, ROM, board serial number, etc. and copy/paste those fields into the new config.plist (making sure that only one EFI partition is mounted when Clover Configurator is running).