If a question mark appears after you install a software update, select your startup disk again using macOS Recovery. If you still see a question mark after waiting a few seconds, use Startup Manager to start up your Mac, then select your startup disk from System Preferences. Wait a few seconds to see if your Mac is able to locate the startup disk you specified. This can happen if the disk selected in the Startup Disk pane of System Preferences isn't available. If you see a folder with a question mark appear instead of the Apple logo, it means your Mac couldn't find a local or network-based startup disk. The following article has information regarding this type of issue and steps to help rectify it:Ībout the screens you see when your Mac starts up - Apple Support I understand from your post that after you updated your MacBook Pro you now see a folder with a questions mark on your screen when starting it up. Thank you for using Apple Support Communities!
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