iATKOS | United Kingdom

I have a dell latitude e6320. The machine is capable of running all the macos versions from 10.12 to 10.15 according to my testing. The machine runs on a 2520M so it has an HD3000 and sucks in many graphical tasks in Catalina. I’ve wanted to dual boot Sierra and Catalina because Catalina goes well with my other idevices and stuff but there are some incompatible mac app store apps in sierra but i need some video editing software to run. I can dual boot but whenever I install clover, i always end up not being able to boot the other macOS. They have two different efi files and one is not compatible with the other for boot. i’ve tried searching the internet but haven’t found an answer to how can i manage to get two different internal efi’s through which i can manage to boot catalina from one and sierra from the other. any help would be appreciated.