There is only question mark and support.apple.com/Mac/startup reference
MacBook Air 13″, macOS 10.15
MacBook Air 13″, macOS 10.15
If your Mac starts up to a question mark - Apple Support
"A folder with a flashing question mark means that your startup disk is no longer available or doesn't contain a working Mac operating system".
If your Mac starts up to a question mark - Apple Support
"A folder with a flashing question mark means that your startup disk is no longer available or doesn't contain a working Mac operating system".
Hey what’s up
There is only question mark and support.apple.com/Mac/startup reference