How am I supposed to use disk utility when my screen is locked on the apple logo and progress bar?

Try to boot to Recovery Mode.

1. Shut off the Mac.
2. Turn it on, and immediately press and hold Command + R.
3. Go to Disk Utility, and do what you want to do, most likely, this is First Aid: How to repair a Mac disk with Disk Utility - Apple Support.

Cheers,

Jack

What if you hit control on startup but the mouse cursor won’t move to click on disk utility

Anyone know