Sixty Four On Thirty Two (SFOTT)

Two three days ago I’ve seen a news on macbidouille.com – aka Hardmac.com telling us that a guy (Tiamo) on Macrumors.com did a fantastic trick to allow booting for 32 bits Macs.

Well wait, you mean my MacPro1,1 could then have Mountain Lion or Mavericks ?.
So I went to read the thread, at first sounded too painfull, but then I saw that it was a bit of a pain to get it right.

Finally I decided go look a bit more on this.
I first tried to be smarter than other and played with shadows dmg and shadows in shadows and all went really fine, and it’s a good exercise for thin imaging. Except that the installer was telling, huh ! this install has been corrupted (a way to say tweaked) so this is a no go.
Bad news ! It took me some time to realise that the SHA1 / MD5 of the InstallESD.dmg was hidden somewhere and I couldn’t find it out. either in base 64. I found the BaseSystem one in a plist, but not the InstallESD.dmg one. And I was unsing the creatinstaller script from within the Application installer. The good News was that I did boot with Tiamo’s boot.efi only the installer was not Happy.

I then decided to go to the BaseSystem.dmg clone Method which finally is faster in a way.

It’s so great that I then decided to take a personnal challenge and go on coding a small piece of Software to automate all this, and even better patch an existing Key to add other computers.

I’ll keep posted

Olivier
About

Product and graphic designer turned to be a Mac SysAdmin.

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