Grey folder
When turned on my macbook comes up with a gre folder and ? Inside what do I do ?
MacBook Air
Question marked as
The folder with the question mark indicates a problem with the macOS that is installed or with the startup drive. The Mac cannot find a valid OS to boot from.
If your Mac doesn't start up all the way - Apple Support
You will want to restart you Mac in Recovery mode and run Disk Utility to see if the problem can be corrected.
• To boot into recovery mode, press the power button on your Mac, and when you hear the startup chime, press the Command-R (⌘R) keys until you see the Apple logo and progress bar.
• When presented with the macOS Utilities window, select and launch Disk Utility. In DU, click View > Show All Devices.
• Now, from the list on the left, select the lowest volume that is still an indented item of the topmost internal device. It'll likely be named Macintosh HD or Macintosh HD - Data. Then click the First Aid button and let DU check and repair the volume if necessary. Do this to the other volumes and containers on the device, working your way up. Finally, run First Aid on the device itself. When DU indicates the tasks complete, quit the app and restart the computer.
With any luck this will allow your computer to restart properly.
Also, please see:
How to repair a Mac disk with Disk Utility - Apple Support