Jim, thanks for reopening this thread. To appeal towards that fresh start I do not wish to backtrack and engage with previous comments in this thread because of how hairy the discussion got.
Instead, for those interested in wanting to see actual full screen support, I will touch upon a workaround that just came up a little bit short, with the hope of possibly identifying where the incompatibility lies and either sending it to the developer of the project or possibly seeing it addressed in a future release of MC. Therefore the discussion from here is pretty complicated and meant for power users familiar with the MacOS. Please, if you do not have a comment that is germane to this post, please do not derail it with a suggestion that you think works as a substitute. As I mentioned, the suggestions do not work.
In my search for a solution I came upon this
project on GitHub. The workaround is a bit convoluted because the command to "Enter Full Screen" mode isn't available as a menu item in MC that native Mac apps have. However, the command is available via
Quicksilver through the use of its
proxy command. To note, invoking the command without first adding the SIMBL file from the GitHub project did nothing.
First, as a brief intro the workaround, the project on GitHub that I linked to enables Full Screen support on apps that don't normally provide it. To install it, I used
MySIMBL to quickly install and enable/disable it. Once enabled I had to use the Quicksilver app to enter Full Screen mode in Media Center because the command isn't provided within the menu commands of the MC app, but the command, "Enter Full Screen," is available via Quicksilver's proxy command.
I use QS's proxy command on other apps to quickly invoke menu commands without having to use my trackpad, so this isn't specifically set up for MC. But to help others get to where I got to, here's how to set up QS's proxy command:
1. Go into QS's Preferences;
2. Go to Triggers;
3. Hit the "+" button at the bottom of the window to create a custom trigger;
4. Select "Keyboard";
5. In the first pane type "current application" then hit tab when "current application" shows up;
6. In the second pane type "show menu" until it too shows up as the selection then hit enter;
7. A hotkey is needed to trigger the trigger just created: to do so use the cursor and hit the empty space in the "Trigger" column.
8. In the sidebar that opens the shortcut box will be highlighted. I've used "cmd+enter" as my shortcut, but yours could be anything.
Once that is setup, the QS proxy command could be used on any app. But I've listed the steps here to show the effects of the SIMBL file on MC.
So once the SIMBL file has been properly installed and the QS command is set up, I opened MC and invoked QS's proxy command to show MC's menu items, which there are only four, one being "Enter Full Screen."
**DO NOT INVOKE** the command unless you wish to experience the incompatibility that I experienced. What happens next is MC goes into Full Screen mode, but it becomes unresponsive and the MacOS indefinitely creates a new space for MC to go into Full Screen mode. The only way to stop it is to either force quit MC or let MC crash on its own.
I'm wondering if there is a way to figure out why this happens and possibly see if Media Center could be made to work with this SIMBL tweak if there's a simple way to make it work? Or I'm hoping someone more knowledgeable than me could "diagnose" the incompatibility that I could then send to the developer of the GitHub project. It's a shot that I thought was worth taking.