My MacBook won’t go past login page.

Disconnect all external devices in case one of them is causing a problem.

Try booting into Safe Mode to see if it will finish booting. If this works, then you most likely have an issue with some third party software.

If Safe Mode doesn't allow the laptop to boot, then you should run the Apple Diagnostics to see if any hardware issues are detected.

If none of the above helps or identifies a hardware issue, then a clean install of macOS is next. A clean install is when you first erase the disk followed by reinstalling macOS & restoring from a backup. If you have access to another Mac running macOS 14.x Sonoma, then you can even perform a DFU firmware Restore which is even better than just a traditional clean install.....you could of course also first try a DFU firmware Revive.

How to revive or restore Mac firmware - Apple Support

The solid pink line may indicate a hardware issue, but some graphical glitches are not uncommon when booting, waking, sleeping, powering off a computer.

Jay6266 Said:

"My MacBook won’t go past login page."

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Troubleshooting Mac Password Logins:

It might come down to resetting your login password...

1. Go here: If you can't reset your Mac login password - Apple Support
2. Scroll to: Use the Reset Password assistant
3. Proceed from there a necessary.

letthemgo Said:

"Same question here. Touch bar didn't work, restarted it and found that mac kept restarting after i entering the password."

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Troubleshooting a Mac in a Login Loop:

Reset the Password Using the Login Screen:

If you can't get into it, then try changing your password from the login screen. You'd go through your Apple ID to perform this. Find out more here: If you Forgot your Mac Login Password - Apple Support. Make sure that caps lock is not enabled when typing it. No Success? Go here: If you can't Reset your Mac Login Password - Apple Support

letthemgo wrote:

Same question here. Touch bar didn't work, restarted it and found that mac kept restarting after i entering the password.

You should start your own thread so you get a better chance of attracting assistance since your issue probably is not the same as reported by the OP. The OP reported the boot process stalling while you are reporting your laptop is rebooting over & over on its own. That is already a significant difference between you and the OP. Different hardware and different versions of macOS can also complicate things further. You can monitor this thread for updates if the OP ever returns to provide updates in case it could provide clues or ideas for your situation. Trying to assist multiple people with different configurations & even slightly different issues gets very confusing and does a disservice to the OP and all contributors trying to provide assistance. Contributors on this forum are all just regular users volunteering our own personal time to assist people.

Same question here. Touch bar didn't work, restarted it and found that mac kept restarting after i entering the password.