Apple shares hit an all-time high time after analysts claimed Mac OS X may beat Microsoft's new Windows Vista operating system.
Apple's rumoured launch of an iPhone, observations of strong iPod sales this season, and high expectations for Apple's hardware and software product road map in 2007 all drive shares upwards.
Investors are also considering next year's battle for desktop operating systems between Apple and Microsoft. A JMP Securities analyst report on Barons explains the situation isn't cut and dried - Microsoft may shed users who will then switch to the Mac.
That report suggests Microsoft needs to be ready for slow adoption of its new operating system, and points out that the migration from a previous version of Windows to the new one could be seen by some potential switchers as a reason to move to Mac.