I have an error 43 when trying to delete a folder in Mac OS - I have read that to fix this I need to reset the NVRAM - to do that I need to boot with Command OptionP R - however, this makes the startup noise continually until I release the buttons.
So far so good, but when I do release (I tried after 2 and after 3 startup sounds) - it just boots directly into Windows.
How can I make this work?