I have a strange setup (briefly, I have Windows 10 on an external SSD and I use a MacBook Pro as my main Mac these days in a dock that connects to an external monitor which has a hub - Samsung CJ79 34" - everything, including the SSD, is plugged into the monitor).
Because of this strange setup I can only change startup disks via the Startup Manager - I can't boot directly from the Startup Disk control panel. However, my Windows keyboard doesn't work to change desktops I need to plug in my original Apple keyboard.
Knowing that MacOS is basically a heavily modified UNIX setup I hazard to guess there is a command somewhere in the OS (like the init command) that will let me boot directly from MacOS to the Startup Manager screen.
Does anyone know what this is and if it is possible? Thanks.