Boot Manager: A Boot Screen Alternative in the status bar of your Mac:No, I don’t swap GPU to boot into Windows. That’s why I want a 7750 to have the boot picker. At the moment I’m still on 10.13.6 because of me only having a GT120 and Mojave wasn’t an option thus far. But now I have a RX570 and pulled out my GT120 to do that upgrade.
I think I should install iMacPro boot camp utils and look for some other way to boot into Windows from inside macOS, with manual bless or something else as suggested.
https://forums.macrumors.com/thread...native-in-the-status-bar-of-your-mac.2145374/