The macOS installer has gone to a more sleek, black screen. However, sometimes it is helpful to see the installer log and get access to utilities. Check out the video to see how to use the keyboard shortcut command-option-control-w to switch back to the standard macOS installer. Also, get access to a grayed out menu for accessing the Terminal and Disk Utility by holding down command-option-control when selecting the menu items.
Based on a hint from awesome https://scriptingosx.com. Sign up for the newsletter there for great macOS hints every week.