Guide for multiboot (2) OS X Versions?

Hi all..hoping some can point me in the right direction

I tried reading the guide in the sidebar https://hackintosh-multiboot.gitbook.io/hackintosh-multiboot/uefi/

And all other guides on google seem to be for Mac + windows or Linux.

I’m still unsure how to do it properly.

I’ve been running vanilla Sierra for a while and wanted to install Catalina on a new 1TB ssd.

Then use clover boot selection to let me pick from (current)Sierra or Catalina(newSsd)

What is the simplest way for me to do this without screwing up my current setup?

submitted by /u/stixx_nixon
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