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Supermacguy

macrumors 6502
Original poster
Jan 3, 2008
424
733
I've got a MacPro 4,1, already updated firmware to 5,1 firmware. Runs great.
If I upgrade to High Sierra, it wants to update my firmware to the HS version.

Can I still multi-boot to Sierra after this firmware updating? Are there any other multi-boot issues after HS update?
 
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