Bootcamp - show bootloader by default I have MacOS Catalina and Windows 10 Enterprise installed using Bootcamp, but it's a bit finicky getting the bootloader to show up (I know it's the option key, but it doesn't always work). Is there a way to get the Bootloader to display by default, and just boot into the default operating system after n seconds if no action is taken?
There is no such native feature. You can use a third-party bootloader like rEFInd to achieve what you want.

P.S. If holding Alt/Option on boot genuinely doesn't reliably show the Startup Manager for you, you should probably get that checked out.