Minecraft coordinates not shown?

I play Minecraft on a MacBook Pro and have the problem that the coordinates are not shown in the debug window. Up until now I have always read that you should select "Reduced Debug Info - On" in the chat settings. I've already done this, but the coordinates are still not shown. Am I now forced to delete the game and download it again or is there an easier solution?

You can use LabyMod or Badlon Client. These are extensions for Minecraft. I use LabyMod and there you can set where and when the coordinates are displayed.

I have always read so far in the chat settings "Reduced Debug Info - To"

The other way around, you should have the setting off: 3