Q: Error installing El Capitan after Time Machine restore
I'm attempting to install El Capitan on a Mid 2010 Mac Pro and am running into a lot of issues. During the initial install I experienced a kernel panic because I had an outdated driver for an outdated PCI card. I removed the card and restored my Time Machine back to OS X Yosemite v 10.10.5 then I deleted the outdated driver. There was also a problem with PostgreSQL after I restored from Time Machine where it kept asking to allow it to accept incoming connections. I downloaded El Capitan again v 10.11.0.1 upon installation I came to this screen:
Here are the log errors:
1. Oct 16 12:35:54 user InstallAssistant[1531]: Package Authoring Warning: The installer script defines but doesn't use (and can't install) package id com.apple.pkg.OSUpgrade version 10.11.0.1.
2. Oct 16 12:37:02 user InstallAssistantTool[1546]: Couldn't bless the installation disk: /
I attempted to reset the system date as suggested in this thread: OS X El Capitan install, but that was unsuccessful, then I tried installing from a thumb drive and in safe mode both of which stopped working when they came to that screen. Then I tried installing from the boot menu and it again froze on the same screen.
Any ideas what I should do or what could be causing the problem? Thank you!
- Sam
Mac Pro, OS X Yosemite (10.10.5)
Posted on Oct 16, 2015 10:14 AM
Ok I have finally figured out my own problem. So if someone, someday reads this here you go...
When I upgraded to Windows 10 or when I had that kernel panic with an obsolete PCI card it must have stored some information in my NVRAM, which is part of the ram that stores such information. All I had to do was reset it using a simple keyboard shortcut: Command (⌘), Option, P, and R. You can read the full article here: How to Reset NVRAM on your Mac - Apple Support Hope this helps someone. I was finally able to upgrade to El Capitan.
- Sam
Posted on Oct 30, 2015 9:02 AM





