I can tell BR to boot to the windows partition from the icon and it will, or reboot from the Windows 10 Pro side and it will boot back to the Mac side, but I never actually see the selection window appear. I’ve tried several things (un-installing), (re-installing) but the selection screen never shows up. Got any ideas? SIP is disabled.
P.S. this is a 2017 iMac 27’ with a Fusion drive (2TB) 24GB RAM. Running 10.13.1