[MSi-GP73 8RE] Dual Boot High Sierra and BigSur

[darkryusai]

Currently I've dualboot MacOS on my machine, High Sierra and Big Sur (ESP and OS on the same disk, M.2 SATA)
Is there anyway to make this happen :
- While I'm on High Sierra, my SSDT-dGPU-Off is ON
- While I'm on BigSur, my SSDT-dGPU-Off got off (by DSDT, config or something else?)

I'm using :
- Opencore 0.6.5
- DSDT patched (unless for dGPU and tbh, don't know how)
- EFI configured by Dortania guide

Would appreciate any help....

 

[Middleman]

Easy. The only way to do that would be to have two separate EFI configurations, and then place the relevant EFIs into each OS partition. ie. the High Sierra EFI with SSDT-dGPU-Off, you put into the High Sierra EFI partition, and vice-versa for the Big Sur but with SSDT-dGPU-Off.aml removed from the ACPI folder and config.plist. And then the way to select them would be when you boot your PC at the boot menu ie. F8 or F12 key. The OSes will have to be on separate disks ideally for this to work.