<div dir='auto'>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?<div dir="auto"><br></div><div dir="auto">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. </div><div dir="auto">Gord</div></div><div class="gmail_extra"><br><div class="gmail_quote">On May 31, 2019 10:35, Ron Singh <ronsingh149@gmail.com> wrote:<br type="attribution" /><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div dir="ltr"><div style="font-family:'tahoma' , sans-serif">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?</div><div style="font-family:'tahoma' , sans-serif"><br /></div><div style="font-family:'tahoma' , sans-serif">Oh yeah, I did stick with Legacy BIOS on that Toshiba, cannot recall if it even had EFI.</div><div style="font-family:'tahoma' , sans-serif"><br clear="all" /></div><div><div dir="ltr" data-smartmail="gmail_signature"><div dir="ltr"><div>Thanks,<br /><br />Ron Singh<br /><br /></div></div></div></div><br /></div><br /><div class="elided-text"><div dir="ltr">On Thu, May 30, 2019 at 10:27 PM Gordon Dey <<a href="mailto:gordon.dey@happydeys.ca">gordon.dey@happydeys.ca</a>> wrote:<br /></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb( 204 , 204 , 204 );padding-left:1ex">So as luck would have it, I find myself attempting to put ubuntu onto an<br />
empty iMac4,1 (early 2006, core duo--not '2').<br />
<br />
I can boot an external macbook install usb cd disk, but of course, the<br />
installer bails when it realizes the iMac isn't a macbook. Utilities<br />
work, and I can show hardware inventory. Internal cd no longer works.<br />
AlltThis tells me that I can boot from a usb cd if the magic is right,<br />
and that the iMac is complete and working.<br />
<br />
I have googled, created a number of CDRs with various incantations, 32b<br />
(because it seems that the efi boot programme on the 4,1 is 32b),<br />
including Matt Gadient's magic mac fix, even rEFInd on amd64. But<br />
nothing else boots.<br />
<br />
Any practical advice for an old iMac4,1?<br />
<br />
Gord<br />
<br />
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