have an imac i5 2015 and triple boot macos with opencore ,win-11 and kde on one internal ssd good fun setting that up but all works very well. I have learned that taking the trouble to learn the best way to use win-10 or 11 in linux is a minimul install in qemu ie chris titus and get instant windows at native speed without reboot. If any one needs help please feel free to contact me.
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triple boot with mac/win/linux on the same disk seems a trifecta that’s way over my head or some sort of engineering feat. Or you are a sorcerer… 
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