Has anyone seen this before?

[Spitvitriol]

My moms macbook pro is on this infinite cycle and it shows us this screen for a few moments before restarting and showing us the screen again. Im just trying to help her out we are very confused she says she was upgrading to the new ios and this happened

 

[ab298]

Try starting in Safe mode; if it works then restart normally.

Otherwise use Recovery & either reinstall or restore a suitable backup.

Use safe mode to isolate issues with your Mac - Apple Support

macOS Recovery - Apple Support

 

[ZapNZs]

You are probably going to need to reinstall the OS IMO. Was this an upgrade to macOS High Sierra?

First, as ab298 noted, you can try booting into safe mode (hold shift at startup.) You can also try resetting the PRAM and SMC, and booting into the recovery partition and running First Aid through Disk Utility (if this happened during an upgrade, such efforts may be futile.) To check for hardware failures, you can hold the 'D' key at startup which will launch Apple Diagnostics - to help try to rule out that this has a hardware cause.

An OS reinstall deletes everything on the drive. So, A) are all of the files backed up?, and B) if not, what MacBook Pro is this?

 

[Fishrrman]

I would suggest you create a USB flash drive installer.
Then boot from the flashdrive and re-install the OS that way.

Do you have any kind of backup at all?
Do you have access to a DIFFERENT Mac (to prepare the flashdrive)?

 

[Schranke]

Had the same come up once, but it was on a rMBP which already has it few shares of problems. I just reinstalled the OS and that was it.
Safe mode and other things did nothing to help me

 

[ab298]

...An OS reinstall deletes everything on the drive….

It doesn't, unless you erase the startup disk

https://support.apple.com/en-us/HT204904