El capitan freeze during install

I Have the same problem that it gets to 90% and freezes, fans running overtime! I have tried to start in safe mode but I have no chime when starting up, it just goes straight back to 90%...

Reboot from an external disk! I too was unable to restart exactly like you, so I reboot from an external disk. Try it. it works!

Thank you so much, it worked on a MacBook Retina late 2013. Had the problem with Yosemite, could not find the reason, clean reinstall, one month of problems. Now upgrade to El Capitan, same problem, without extensions finally working.

Just had to do this AGAIN with the latest update to El Capitan! Thank you again Denbee for figuring this out! Booted from the edrive partition on my hard disk, moved kext files (only two, both printers) and voila it was solved. Oh Apple!

This helped me so much! The only amendment I would make is that safe mode boot I held the shift down inbetween the startup noise and the apple logo. The command -R takes you to recovery mode.

Your procedure worked for me too! Thanks. Only issue is to boot in safe mode is shift, and it takes a long time to boot up so patients is required. Thanks again.

Denbee's instructions were great! I was able to troubleshoot the install on my MBP Early 2011 going from Mountain Lion to El Capitan. As other posters mentioned I did NOT have to try one kext file at a time. I simply copied them to the unsupported folder, re-started, installation succeeded, put them all back in, restarted, and it worked flawlessly. It saved me hours of hoping the hanged beach ball cursor and progress bar would move.

AFterr command+R whats the next step?

Where and how do i manage these files? How do i access them?

I have an early 2011 MacBook Pro and it gets stuck at the very start of the install which is a bit different from most posts I've read. I've wiped the hard drive and did a clean install of Lion off a USB, that's all I had available. Download El Capitan and same issue, tiny progress on the install Apple logo screen but it just sits there for hours. I've tried safe mode, shift key after start up sound, but it just comes back to this screen. Any thoughts?

Might be having the same issue as you, and it's got me stumped. I installed El Capitan on to an SSD, but when I install the SSD, the Mac will not boot from it. It WILL boot from the SSD if I put it in a USB case. But not internal. Are you saying that Lion DID work for you?

I have Lion on a USB and I am able to boot from that. Once I start the El Capitan install and it freezes, I have to reset the PRAM then recovery mode to delete the hard drive, then the USB Lion install Goes through. Resetting the PRAM has to be done or it won't work, for me anyway. My battery is completely dead, I'm thinking this may have something to do with it but I'm not sure. I found my Mevericks and Yosemite downloads in iTunes purchase history and am now attempting a Yosemite install however that enjoys hanging out at 20 minutes remaining for hours at a time. My hope is to get Yosemite running then try to upgrade. Thankfully I have another pro and and air so I'm not stuck without one while I work on this.

>> battery completely dead<<

all those installers require you to have a working battery AND to connect the power adapter.

My other pro, identical to this one, had no battery in it at all and it updated to El Capitan...

a) In my opinion, you got lucky.

B) on a desktop Mac, there are capacitors in the power supply that smooth over ripples and sags and spikes in the DC power. On a notebook computer, the battery does that job. While it is common to run a notebook computer without a battery while under repair, it is NOT recommended for daily use. Power fluctuations are conducted directly to the chips, and that may cause premature failure.