Big sur Update
My MacBook pro 2015 only shows progress bar after upgrading to big sur
MacBook Pro 15″, macOS 10.14
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User profile for user:
MichaelB2019
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Community Specialist
Hi izuchukwu225,
Thanks for coming to Apple Support Communities for help today with your MacBook Pro update. It sounds like it's stuck on a progress bar.
It may be resolved at this point, but if not try restarting in safe mode: How to use safe mode on your Mac.
If the Mac starts up all the way, check for third-party start up items that may be interfering.
Let us know how it goes.
Have a fantastic day!