Startup disk ruined my booting setup
I had things set up quite nicely: turn on the power, and im presented
with a black screen and "m for macos, l for linux". Defualt was macos
after 10seconds. Or, I could hold down option key and get icons for
the different OSs.
I opened the Startup Disk control pane, didnt touch anything, just
opened it to have a look out of sheer boredom, and now it boots
straight into macos, though the option key thing still works.
I tried running ybin, but it didnt change anything.
PS. Thank you for replying to my previous posts, sorry for not
thanking you personally (you know who you are!).