Macpro 1,1 el capitan updated now I can't boot

[Katmai]

So like the title says I have a Mac Pro have el capitan running on it, it updated and now I can't boot. as far as I can tell this is because my boot.efi is hosed and I need to rebuild it to get the computer working again. I just don't know how to get that accomplished. If possible I could be pointed in the right direction to figure out how to save my boot efi. I have Lion also installed on the computer. so I do have access to running mac on this computer as well.

 

[jbarley]

Check out this thread, everything you need to know is in here somewhere, including how to protect your system from this occurring in future updates.
https://forums.macrumors.com/threads/2006-2007-mac-pro-1-1-2-1-and-os-x-el-capitan.1890435/

 

[Katmai]

Thank you so much for the link, I found this youtube video hxxps://www.youtube.com/watch?v=WgdwbUmG8Tc and it is a really straight forward process, a lot easier than I had worked myself up about, now time to read that forum and figure out how to stop it from happening in the future

 

[jbarley]

take a look here, at post #1390
https://forums.macrumors.com/threads/2006-2007-mac-pro-1-1-2-1-and-os-x-el-capitan.1890435/page-56

Myself I used boot64 easy, just run it and forget it...

 

[Katmai]

Wow I feel really dumb, I went trough and did the entire post 1390 to get el capitan installed originally, If I would of just looked at the next post down It would of saved me hours of scrambling to fix my install. Thank you so much for the help.