BDMahan wrote:
When trying to set a recovery key for the first time...a window opened that says, "are you sure you want to create a recovery key?" But the window is small and won't expand to let me see the whole message/window and now I can't even restart my computer. I can't close system preferences
https://discussions.apple.com/content/attachment/4056c56f-18d6-4aad-b4ec-6dfd9818ca50
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You can always force quit a shutdown by holding the power button/TouchID for ~6-10 sec.
Force Shut down your Mac.
Log out, sleep, wake, restart or shut down your Mac
Shut down or restart your Mac - Apple Support
more:
How to generate a recovery key - Apple Support
Two-factor authentication for Apple ID - Apple Support
Use two-factor authentication for security on your Mac, iOS ...
if no insight or resolve—
Call Customer Support (800) MY–APPLE (800–692–7753)
or on line Apple Support
Outside the USA—Contact Apple for support and service by phone
See a list of Apple phone numbers around the world.
Contact Apple for support and service - Apple Support