Using BootRunner 3.3 on my 16" MBP (Catalina) - BootRunner loads fine. It will allow me to proceed into macOS without issue. The issue is that after using BootRunner for a couple of months, suddenly my Windows 10 (Bootcamp) option does nothing when I click on it or select it and then press enter.
There have been no significant changes that lead me to believe that something I did with the computer could be the reason I am having this problem.
I am still able to option-boot to Windows, and it loads normally.
I have already uninstalled and reinstalled BootRunner. I also tried tweaking the profile to refer to specifically to “disk0s3” instead of the volume title “BOOTCAMP”. (And I installed the updated profile, of course.) Still, nothing happens when I choose Windows in BootRunner. It does chime if I repeatedly press enter (the macOS “you’ve reached a dead end” chime)
Windows has NEVER appeared as a startup disk in macOS preferences. I always thought this was strange, but it never had any effect on BootRunner.
Also, both OSs are on the same internal 1TB SSD.