MacOS – Unchecking “Restore windows when quitting and re-opening apps” doesn’t work

Places to check for things intercepting the keystroke:

1. Browser Extensions: Perhaps the same extension on both browsers

2. Macro App: TextExpander or Keyboard Maestro, for example

3. Services Shortcut: In the Chrome or Firefox menu choose Services then Services Preferences.... Scroll to the Internet section and see if anything is set up to use the Cmd` shortcut.

4. Application Shortcuts: In that same dialog (or choose Keyboard in the System Preferences click Application Shortcuts in the left pane and see if there are any custom shortcuts for Chrome and Firefox that use that combination.

This is a known issue and the author doesn't plan to fix it.

I encourage someone to go further and implement it because personally I don't use fullscreen apps right now and I don't plan to fix this anytime soon.

Luckily, there is a workaround described by vvlad.

As an workaround you can set LSUIElement in Terminal's Info.plist

It has several drawbacks but otherwise works like a charm:

• Terminal no longer shows on Dock;
• There is a space the size of the top bar on top of every TotalTerminal visor opened on fullscreen apps windows;
• You can no longer ⌘⇥ to regular Terminal windows;
• You cannot Force Kill Terminal process.

This is how it will look like:

How It Works

LSUIElement (String - Mac OS X) specifies whether the application runs as an agent application. If this key is set to “1”, Launch Services runs the application as an agent application. Agent applications do not appear in the Dock or in the Force Quit window. Although they typically run as background applications, they can come to the foreground to present a user interface if desired. A click on a window belonging to an agent application brings that application forward to handle events.

The Dock and loginwindow are two applications that run as agent applications.

How to Do It

1. Open Terminal (assuming you already have TotalTerminal installed)
2. Run sudo nano /Applications/Utilities/Terminal.app/Contents/Info.plist

3. Add these two lines right after opening <dict> tag:

   <key>LSUIElement</key>
   <true />
   

4. Save and close the file by pressing ^O Enter ^X
5. Quit Terminal and launch it again