Boot up after installing El Capitan

II updated my macbook Pro last night and left it plugged in to finish. I closed it this morning to take the class and I am stuck on an almost finished progress bar. No matter how many times I press he power button to restart, it restarts to the same page. Help?

This worked perfectly for me, thanks!

I created a backup of the whole extensions directory and then started deleting the 3rd party kexts.

Now to find exactly which kext was causing the issue...

I had this same issue after installing El Capitan. Everything seemed fine until I tried to restart. I finally got it shut down and when I tried to start again it wouldn't boot.

Max108 over on the Developer Forums fixed the problem for me and my MacBook Pro is starting up just fine now. I found him here: https://forums.developer.apple.com/message/68726

Turns out, AVG free anti virus was the culprit in my case....

Hi,

thanks for posting a remedy.

Have same problem with empty progress bar on boot.

Could you please explain what you mean by what you put in parentheses:ls /Volumes (-l from line, large, long-) ?.

Do i have to enter the words in the command line in italics, bold?

Where you show a space in the command line, do I put a space?

Thanks for helping me out,

Johannes

Aftter installing an update for el capitan, progress bar stuck up at completion while restarting. Cant go further. Reinstalled OSX el capitan again . But no sucess. Always after sucessful installation. While restaring progress bar stuck at completion. Please if somebody or Apple can guide.

Same happened with me. But still no solution found.

I was having the same problem when trying to migrate. The only thing that solved was this solution you mentioned:

1) Erase hard drive

2) Re-install mountain lion

3) Upgrade to El Capitan

4) Migrate from a time machine backup trough migration assistant

Thanks for sharing your solution. It really helped me.

Cheers from Brazil,

JP Jacobsen

Although I have not yet found the reasons for the poor performance of El Capitan on my Mac Mini, I have found a workaround that is almost 100% effective.

Early in the boot-up process, the screen displays a gray Apple logo with a narrow gray progress bar below. The progress bar increases in length noticeably for about a minute, but then slows significantly at about the 60%-70% mark. At this point, I press and hold the power button on the back of the computer for five seconds, which causes the computer to shut down. Then I immediately press the power button again to initiate another start-up. I find that it proceeds normally and quickly, and that I no longer get the spinning beachball every few seconds all day long.

I don’t know if it is relevant, by my machine is configured NOT to display a login dialog on start-up.

If you find this workaround to be successful for you, please add a posting here. It may eventually help us diagnose this problem better.

If you have skill in interpreting console messages, I could post messages before and after the forced shutdown. That might also help us diagnose this problem better.

My configuration: Mac Mini, late 2009, 2.6 GHz Core 2 Duo, 4 GB RAM, 500 GB internal disk with 130 GB partition for El Capitan 10.11.3, 1 TB Western Digital FireWire 800 external disk for Time Machine

In doing the upgrade I was unable to get my Macbook Pro operating again. I found a posting by Max108 in the Developer Forum; and he is super helpful, quite personable and very reasonably priced. I highly recommend him. https://forums.developer.apple.com/message/69220