macbook pro stuck on boot after installing 10.12.2

Hello Stephen!

Can you help me please? I don't understand much of computers and using Terminal.

I enter into Recovery Mode, then get into the Terminal window and then I'm stuck. Don't know what else to do. I typed what was instructed but nothing happens.

What should I do exactly, please?

Hello David!

Can you help me please? I don't understand much of computers and using Terminal.

I enter into Recovery Mode, then get into the Terminal window and then I'm stuck. Don't know what else to do. I typed what was instructed but nothing happens.

What should I do exactly, please?

I'm not technical at all but do have a basic understanding of linux commands. If you have no idea, then I would suggest you get some help else you break something

First you need to go to your root directory "cd /"

then go to your extensions directory. On my Mac it's at ""cd /Volumes/Macintosh HD/System/Library/Extensions"

list all the .kext files "ls .kext"

and delete the kext files that you don't need starting from the ones described above "rm 'filename'"

Have Apple evaluate that Mac's battery for possible replacement: Mac notebooks Service Pricing - Apple Support.

I don't know what "SmartBattery" is. If it's a required Apple kernel extension I'm not familiar with it.

If it's something you installed please read these Discussions:

kernel panic after macos Sierra upgrade

Sierra stalls in booting (final step in installation)

If you are unable to boot your Mac at all, first try reinstalling macOS. If that does not help, boot from the other devices as you have been, back up the Mac using Time Machine, erase its internal storage, and restore your essential information from the Time Machine backup.

I had the same problem today. All day long trying and failing...

But this last try worked:

I entered Recovery Mode and restored to the previous version of Sierra from my Time Machine external drive (fortunately I had it updated and perfectly working).

It took very long but my MBP seems to be running ok for now.

I have a MacBook Pro 2013. I tried resetting NRAM, SMC, disk repair, safe boot and so on.

I googled and found this: http://www.macworld.co.uk/news/mac/how-do-i-restore-my-mac-time-machine-3449071/

I hope it works for you.

Now I'm afraid of installing that Sierra update again or even rebooting my MBP... :-(

By the way, now Time Machine is stuck on "preparing...". :-P

Is this happening to anybody else? Is this a problem with that last Sierra update? Is my MBP too "old" for that update? Any comments? Any advice?

I found the solution after I had the same error. I can't tell you how disappointed I am about Apple and their Software engineers... If this goes on my next notebook will be a surface one. Switch back to MS... I can't believe it.

Anyway OT again:

Your (and my) problem is because auf a KEXT file which is not compatible to 10.12.2 - the software isn't clever enough to ignore this, so you have to do it yourself. There are some ways. I made it this way:

• Start into Recovery HD
• Open Terminal
• write down: mkdir /Volumes/"Macintosh HD"/kextbackup
• cd /Volumes/"Macintosh HD"/System/Library/Extensions
• look for .kext files which are not part of the normal system
• mv KEXTNAME.kext /Volumes/"Macintosh HD"/kextbackup/

I removed the following and after this the system booted again.

• Belcarra.USBLAN_netpart.kext
• Belcarra.USBLAN_usbpart.kext
• HuaweiDataCardDriver.kext
• JMicronATA.kext
• RemoteControl.USBLAN_usbpart.kext
• UsbEthernetGadget.kext
• USBExpressCardCantWake_Huawei.kext
• vecLib.kext

Of course everybody has his own not compatible kext files in this folder. Actually you can't do anything wrong by just moving them to another place... But I would recommend you not to move any of the APPLE*.kext files and the IO*.kext files. Other files with not that normal names, I would move and try to start.... At the moment my Sound is not working.. So I moved one kext too much, but anyway... I can write this.. in Safari on my Macbook Pro Retina....

in my case it was:

• HuaweiDataCardDriver.kext
• USBExpressCardCantWake_Huawei.kext

or may be only one of these.

Hi guys

The same problem on my late 2011 mac pro. I tried to move the files that caused problems you, but without success.

How about moving them away all and after installation copying them back?

Would it work? Or are there any essential that must remain in the folder?

Thanks for help, it' appreciated

Martin

Hi guys,

I have the same problem and understand deleting some old kext files is the way forward. I am a total novice though, so how do I know which kext files are the culprits?????

So I have moved all kext files and the mac stuck at the same point. Does anybody have any idea what else?

1. do you see apple logo?

2. progress bar remains empty?