These are the steps to keep the top menu bar from disappearing on Mac in Chrome: Step 1. Select the full-screen mode button in the hamburger window of the Google Chrome browser to enter the full-screen view. Step 2. You may also enter the full-screen mode by hitting F11 on your computer or Control + Command + F on a Mac. Step 3. To enter or leave the full screen in Chrome, those who use Macs can also click the expand window option.