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I've tried several times to update my Macbook 7.1 (Macbook white mid-2010, 4GB ram) from 10.8.5 to Sierra but the progress bar remains blocked after the first boot.

When booting into Verbose mode, here is what I obtain:Boot into verbose mode

After a while, I have other messages like:

SmartBattery: finished polling type 1
SmartBattery: finished polling type 4
SmartBattery: finished polling type 4
SmartBattery: finished polling type 2
SmartBattery: finished polling type 4
SmartBattery: finished polling type 4

Which seems to be the same issue than: Mac Sierra won't boot - SmartBattery: finished polling type 4

  • Boot into Verbose mode (hold Cmd-V while booting) and see where it stops. You may need to photograph it or video it to see what messages/errors it generates. However, to answer your question - no, you don't need an Internet connection to install OS X / macOS. If you did, you'd get an error that indicated as much – Allan Jan 13 at 17:52
  • Out of curiosity, did you do an in-place upgrade or did you wipe the drive, install 10.12 cleanly, then use Migration Assistant from a TM backup? I would go with the latter as it's much less prone to incompatible kexts. – Allan Jan 13 at 20:09
  • I did an in-place upgrade, indeed. Would you suggest to you use this how-to to install and migrate cleanly? – supershivas Jan 13 at 20:47
  • That how-to looks fine. The key is to wipe the drive and install macOS so it's like it just came from the factory. – Allan Jan 13 at 20:51
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Two solutions were kindly given by Allan, I chose the "easiest" one:

  • In recovery mode, access to Terminal
  • In /Volumes/"Macintosh HD"/System/Library/Extensions directory, remove Huawei .kext files (using rm -rf command) or other non-essential kext files. It appears that, for some reason, many users had issues with Huawei kext files...
  • After reboot, the installation was completed seamlessly, Sierra is finally installed.

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