HELP Mac pro 1,1 Yosemite 10.10.2 gray screen

[theyshoot]

so I installed pike fix. efi read 64bit. installed 10.10, then 10.1, then 10.2 and now its stuck on Gray screen. is there anyway to do a fresh install on Mac pro 1,1 from boot up with the pre loaded Yosemite usb?

sometimes I can get in disk utility

 

[F1Mac]

so I installed pike fix. efi read 64bit. installed 10.10, then 10.1, then 10.2 and now its stuck on Gray screen. is there anyway to do a fresh install on Mac pro 1,1 from boot up with the pre loaded Yosemite usb?

iirc 10.10.1 didn't change the boot.efi, it started with 10.10.2 - you sure you installed PikeYoseFix correctly?

Yes a pre-loaded installer should work (although I haven't tried it myself, I built my own installer), just hold option at startup and select the usb drive, you will then be able to to a clean install.

sometimes I can get in disk utility

??

 

[theyshoot]

really don't remember if I installed pike fix correctly. I tried a partition and install 10.10 on that but it wouldn't work. do I have to load boot efi first? I downloaded the pre install Yosemite from this forum. so I have a perfect usb install to work from.

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iirc 10.10.1 didn't change the boot.efi, it started with 10.10.2 - you sure you installed PikeYoseFix correctly?

Yes a pre-loaded installer should work (although I haven't tried it myself, I built my own installer), just hold option at startup and select the usb drive, you will then be able to to a clean install.

the install crashes and a restart button comes up. thinking 10.10.2 really altered the boot

??

the install crashes and a restart button comes up. thinking 10.10.2 really altered the boot

 

[F1Mac]

really don't remember if I installed pike fix correctly. I tried a partition and install 10.10 on that but it wouldn't work. do I have to load boot efi first? I downloaded the pre install Yosemite from this forum. so I have a perfect usb install to work from.

You don't have anything to do regarding the boot.efi if your usb installer is ready. Just restart your mac holding the option key, and select the usb stick. The OS X installer will do the rest.

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the install crashes and a restart button comes up. thinking 10.10.2 really altered the boot

Once you have Yosemite working, install PikeYoseFix and restart your mac TWICE. Then you'll know the daemon is doing its job. You should then be able to update to 10.10.3 directly from the App Store and never worry about the boot.efi again, until 10.11 comes out 😉