If you notice that the Menu Bar at the top of your screen is missing, it is probably because you are using an app in Full Screen mode. You can customize how this works in System Preferences. You can also use Mission Control and Spaces to have the Menu Bar present for some apps and not others.
My Apple Icon, all of icons on top menu bar are gone. I have tried everything, can't get Apple icon back or even View. It happened after an Apple upgrade yesterday. Any help? Thanks
Cynthia: Sounds like you are in Full Screen mode or you have hidden the Menu Bar in System Settings. Watch this video and it explains it.