> When a Macbook is plugged into an external monitor, if you close its lid, it will only stay awake if the power cord is plugged in (otherwise it goes to sleep).
If it allowed you to run in clamshell on battery power, you'd be able to, for example, switch your monitor to show a different input, forget about the (closed, silent) MacBook and run the battery down to zero with no indication.
> The green “traffic light” button in the title bar makes the current window fullscreen instead of maximizing it.
That's because "maximize" is a Windows thing and you're not on Windows. The green button feature is called Zoom (I believe) in macOS and it's basically "resize to content". The fullscreen thingy used to be a separate button (Mavericks), which IMO was a bit better.
> When in the fullscreen mode mentioned previously, the Cmd ` shortcut to switch between windows of the same program doesn’t work.
The shortcut switches between windows that are on the same Space (so that it switches between your different casual-browsing and work-related windows inside their respective spaces if you're the kind of person who keeps different spaces for different situations/projects).
A fullscreen app doesn't cover other apps, like on Windows, but instead goes to its own space. That's why the shortcut can't do anything.
If it allowed you to run in clamshell on battery power, you'd be able to, for example, switch your monitor to show a different input, forget about the (closed, silent) MacBook and run the battery down to zero with no indication.
> The green “traffic light” button in the title bar makes the current window fullscreen instead of maximizing it.
That's because "maximize" is a Windows thing and you're not on Windows. The green button feature is called Zoom (I believe) in macOS and it's basically "resize to content". The fullscreen thingy used to be a separate button (Mavericks), which IMO was a bit better.
> When in the fullscreen mode mentioned previously, the Cmd ` shortcut to switch between windows of the same program doesn’t work.
The shortcut switches between windows that are on the same Space (so that it switches between your different casual-browsing and work-related windows inside their respective spaces if you're the kind of person who keeps different spaces for different situations/projects). A fullscreen app doesn't cover other apps, like on Windows, but instead goes to its own space. That's why the shortcut can't do anything.