I'm making an application that starts as a launcher and plays a video in fullscreen and I need to disable the status bar from showing (+ the drop down menu) because I don't want the user to be able to browse the settings or get out of the applications. If you want to have custom icons in your Mac’s menu bar, there’s a way to replace the default ones. Tick the box next to “Show Wi-Fi status in menu bar.” How to replace menu bar app icons.
To enable the Wi-Fi icon in your Mac’s top bar, go to System Preferences and select Network. Users & Groups includes all the users of your Mac.