okay you were right... i was in the wrong folder (these Mac's are not that user friendly)
how ever.... have you ever wondered what would happen if you changed the value in the key to something else?
like change the contents inside the blue on line 5?
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No, they're user-friendly, just perhaps different from what you are used to?
Alas, you didn't answer my question, and are now asking an unanswerable question, since you cropped off the most important information in the screenshot!!! (It's great that you're making the effort to do screenshots, but they must actually show the relevant information to be useful for troubleshooting purposes.) Since you don't really understand the Mac's innards, I wouldn't go poking around doing stuff you don't understand, such as editing plist files and running terminal commands. Instead, provide detailed information (including answering questions asked of you) so that others can guide you.
Which terminal command (what you called a "command line request") did you run that solved the problem?