[kwlug-disc] imac4,1 help

[Paul Nijjar]

Matt Gadient's page seems to disagree that Core Duos could run 64 bit.
So does this page:
https://everymac.com/systems/apple/imac/specs/imac_cd_2.0_20.html

If you had a working internal CD-ROM drive would that make your life
easier? Can you boot any non-Mac CDs from the external CD drive?

- Paul

On Fri, May 31, 2019 at 12:28:35PM -0400, Gordon Dey wrote:
> From what I read, the efi booter is 32b but the core duo can run 64b. Be that
> as it may, I have tried both the amd64 and i386 isos. Some people have tried
> putting the 32b boot.efi onto an amd64 iso just to solve this. Presumably,
> though, the i386 iso should support 32b efi boot?
> 
> But the thing is, the iMac doesn't see anything it wants to even attempt to
> boot, so there is no kernel loaded to even set options on. 
> Gord
> 
> On May 31, 2019 10:35, Ron Singh <ronsingh149 at gmail.com> wrote:
> 
>     Not sure if you are using a 32-bit or 64-bit cut of Ubuntu, but I ran into
>     a similar issue 2 years back on a older Toshiba Core Duo laptop and using
>     Mint 18.2 32-bit, and requiring me to turn on the "force-pae" flag in the
>     bootloader was the ticket to success in installing Mint Xfce 32-Bit (with
>     PAE-forced) on that old thing. Worked a treat. I wonder if it would word in
>     your case?
> 
>     Oh yeah, I did stick with Legacy BIOS on that Toshiba, cannot recall if it
>     even had EFI.
> 
>     Thanks,
> 
>     Ron Singh
> 
> 
> 
>     On Thu, May 30, 2019 at 10:27 PM Gordon Dey <gordon.dey at happydeys.ca>
>     wrote:
> 
>         So as luck would have it, I find myself attempting to put ubuntu onto
>         an
>         empty iMac4,1 (early 2006, core duo--not '2').
> 
>         I can boot an external macbook install usb cd disk, but of course, the
>         installer bails when it realizes the iMac isn't a macbook. Utilities
>         work, and I can show hardware inventory. Internal cd no longer works.
>         AlltThis tells me that I can boot from a usb cd if the magic is right,
>         and that the iMac is complete and working.
> 
>         I have googled, created a number of CDRs with various incantations, 32b
>         (because it seems that the efi boot programme on the 4,1 is 32b),
>         including Matt Gadient's magic mac fix, even rEFInd on amd64. But
>         nothing else boots.
> 
>         Any practical advice for an old iMac4,1?
> 
>         Gord
> 
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> 

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