El Capitan install won't resume after restart

[IronMann]

I have a working Yosemite hackentosh that I just tried updating in place via App Store update. Download finished and I ran the install. I agree to terms, press continue etc. says it'll reboot automatically. But when it restarts, the install doesn't resume at all. I've tried 3x now. The 1st time, the install ran for about 15 mins. Now it runs about 14 seconds, reboots, then just won't resume. About this Mac still says Yosemite 10.10.

i have nvidia disabled, graphics enabler no and injectnvidia false.

any help appreciated.

 

[JDChristensen]

I had a similar experience. I ended up trashing the download, and re-downloading. The second download worked as designed.