Update README.md

README.md

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 # MenuBarAppearance
-Change the macOS system appearance from the menu bar
+Simple menu bar app to change the macOS system appearance from the menu bar  
+<p align="Center">
+<img width="146" alt="Main Window with Icon (Dark)" src="https://user-images.githubusercontent.com/52137472/222544403-1bcaf65d-6ff3-4a45-b7ed-f502b679a4b2.png">
+<!-- <img width="162" alt="Main Window" src="https://user-images.githubusercontent.com/52137472/222543131-025f8275-4a3b-4c7c-8f62-28e3ca8c2e1d.png"> -->
+<img width="156" alt="Main Window with Icon (Light)" src="https://user-images.githubusercontent.com/52137472/222544862-53ded5e8-0502-4eff-ba6d-34a417accafc.png">
+</p>
+
+## Building
+1. You will need to add your own AppIcon.
+2. Build in Xcode with `Product->Build`
+
+## Running
+### Requires macOS 13.0 or newer
+1. Open app
+2. Add to Login Items in System Preferences/Settings
+
+This app is the successor to the Java-based StatusBarAppearanceToggle. It was much more useful before Control Center came to macOS, so I understand that it's a bit odd that I made this for macOS 13.0 or newer. I think it looks nice on my menu bar, though, so I'm uploading it here in case anyone else wants it.