I have now transferred a lot of my files over to a new 1TB drive, and have an entire empty 500GB drive to install Catalina onto.
I am looking over this process and establishing what I have already done and what still needs doing:
https://www.tonymacx86.com/threads/...ported-intel-based-pc.285366/#create_unibeast
I have now installed the Catalina folder (macOS Install Data) onto my applications folder on my internal 1TB HD, and also have a copy of this folder in my root folder for my HD1 (with current OS 10.9.5).
When I installed the "macOS Install Data" folder onto my empty 500GB and restarted, I expected to be able to boot this new Catalina OS on the Chameleon screen, but this didn't happen.
So, I restarted again with Unibeast in a USB stick in the computer, but I still didn't see an option when I restarted.
I have now looked back on this thread:
https://www.tonymacx86.com/threads/...cted-mac-os-x-installer-is-incomplete.249330/ ... and realised I could have overlooked the terminal instructions (sudo -s, etc). I completed this, and then went back to launching Unibeast to see if I could get past "macOS Selection" screen, and this time it didn't give me the "incomplete" warning... I now see the Bootloader Configuration screen - yay!
I had to choose between UEFI or Legacy, after looking at the forum I couldn't see which option was more appropriate for my mobo (Gigabyte GA-Z87X-UD3H), so I chose UEFI.
I was able to get through the steps and boot up my new USB with a Catalina installer on it.
Aftew holding down F12 on a restart, in the BIOS I selected by USB to boot from.
Then in the new clover screen I selected to boot from my 500 GB HD, which I think was a mistake because I was supposed to select "
macOS Install from Install macOS Catalina".
Anyway, by choosing my 500 GB HD in error, it just seemed to bring me back to the Clover boot screen again.
This time I chose the correct setting (bold, above). This got me to something that looked more promising. I selected the language, then went thru the Disk Utility option to delete my 500 GB HD as per the instructions.
However, when I left Disk Utility I was at this step:
7. When the installer asks you where to install, choose Catalina
However, I never received this option. When I left the disk utility it just left me with the Catalina installer. So, trying to follow the guide the best I could, I took this as a prompt to restart, rather than continue.
I restarted, and this time my boot options included the Catalina (instead of just Mavericks).
I chose Catalina, hoping this was the first time I could witness my 500 GB HD (with Catalina) booting up.
Unfortunately I received an error message.
Can't find /mach_kernal
I pressed a key to continue... and I was presented with the boot screen again (Mav. or Cat.)
I chose Catalina, and it caused an error on the Mac boot.
I didn't want to end up with no functional computer, so I decided to pull out all the USB booters and extra drives, shut down, and then boot up as per the norm. Fortunately I was able to boot Mavericks.
I'm not sure why it failed, as I don't really understand the error messages. I will have a look at this later.
Q: ... In the meantime, what do you think I did wrong? - would it have worked if I chose
Legacy over
UEFI?