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:
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
Best Answer
Two solutions were kindly given by Allan, I chose the "easiest" one:
/Volumes/"Macintosh HD"/System/Library/Extensions
directory, remove Huawei .kext files (usingrm -rf
command) or other non-essential kext files. It appears that, for some reason, many users had issues with Huawei kext files...