SillyDog701

[Antony]

According to Cnet News.com, the next generation of Windows, Vista, won't be able to run on Intel-based Mac.

Apple Senior Software Architect Cameron Esfahani said that his understanding is that only 64-bit versions of Vista will support EFI. To this point, all of the Intel Macs have used 32-bit chips.
...
In addition, while EFI has the prospects for supporting many older types of software and hardware, Apple has not included much of that "legacy" code in its EFI implementation.

"Windows is a legacy OS," he said to laughter and applause from the crowd. "We don't have legacy support."

For more detail, please see No Vista on Mac's horizon (Cnet News.com, 9 March 2006)

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[Pu7o]

Also, you might be interested to read Microsoft bombshell: No EFI support for Vista.

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[Don_HH2K]

<rumor>I bet it's a Microsoft-Apple agreement: "I won't let your OS boot on regular PCs if you don't let our OS boot on yours."</rumor>

Since Microsoft still has such a great hold on the x86 market, moving from a traditional BIOS to EFI wouldn't be a popular move, seeing that machines wouldn't be able to boot multiple versions of Windows. Aside from using virtual machine software such as Qemu or VMWare, you wouldn't be able to do backwards-compatibility testing with XP or 2000 (or any older Windows for that matter).

Personally, I'd be kind of angered if I couldn't boot something like DOS (yes, I still use DOS for some things) or an older version of Windows on my machine.

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