Transplant Strategy (AHCI kext)

[muyaad]

OK, you might be having the same problem I had with a Legacy system before.
Install Clover Legacy mode to the root instead of to the ESP. Your system may not work well booting from ESP since it is legacy. Also, be aware that, given the age of the G31M and core2 Duo you have that Catalina may not work at all. The last time a C2D was in a Mac was the 2010 iMac. 2011 and later used the Core i3/i5/i7.
Are you using a supported System Definition? Suggest using iMac 14,1

MacOS Catalina 10.15 is compatible with the following Macs:

• MacBook Pro (mid 2012 and newer)
• MacBook Air (mid 2012 and newer)
• MacBook (early 2015 and later)
• iMac (late 2012 or newer)
• iMac Pro (2017 or newer)
• Mac Pro (late 2013 or newer)
• Mac Mini (late 2012 or newer)

I think this problem has no solution
My system boots from ESP well because the disk that has High Sierra booted well and I have done what you asked for but nothing works.
I was able to do whatever I wanted on the disc that contains Catalina from well booted high Sierra system but the problem is still booting’s

 

[gertjuh]

Little late but telemetryplugin could have been the course of the reboots, on mojave and catalina you have to use an older version like the one of high sierra.had this on my asus p5kpl-cm ( ich7 board).