Microsoft officials previously justified the clause by suggesting it was to protect home users from their own lack of sophistication when it came to security issues. That always seemed hollow to me, as the company was happy to take the extra cash from home users that were prepared to buy Vista Ultimate or Business. (The Enterprise edition also allowed virtualisation.)
Last June, Microsoft was set to reverse its policy but the change was vetoed on the eve of its announcement.
Since that time, Parallels and Fusion have grown in popularity among the Mac community.
Whether the 'no virtualisation' clause actually stopped anyone running Home Basic or Premium in a VM is anybody's guess. My suspicion is that quite a number have been doing it.
That said, Windows XP is generally more popular as a guest operating system as it is more tried and tested, and less resource hungry. The higher levels of security provided by Vista would likely be welcomed by Mac users seeking a second OS to run certain applications.
Apple recently relaxed its licence terms so that Mac OS X Server - but not the regular desktop version - can be run under virtualisation.
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Stephen Withers is one of Australia¹s most experienced IT journalists, having begun his career in the days of 8-bit 'microcomputers'. He covers the gamut from gadgets to enterprise systems. In previous lives he has been an academic, a systems programmer, an IT support manager, and an online services manager. Stephen holds an honours degree in Management Sciences, a PhD in Industrial and Business Studies, and is a senior member of the Australian Computer Society.