This just in from Jeffrey Tranberry: "I’m pleased to announce that we’ll be providing official support for Windows XP, in addition to Windows 7, with Photoshop CS6.
We know that some of our Windows customers were concerned about Photoshop CS6 dropping Windows XP support similar to Lightroom 4.
We will, however, be dropping official support for Windows Vista (Please note: although Windows Vista is not officially supported, we do not restrict users from installing and using Photoshop CS6 on their Vista Systems)
Why is Photoshop CS6 still supporting Windows XP?
Quite simply, Photoshop’s user base is much different than Lightroom’s and many more of our customers are still on Windows XP. However, the number of our customers on XP is decreasing and we expect to see more and more of our customers to migrate to Windows 7 and Windows 8.
On the Mac side, we made the decision to end support for Macintosh systems that are not 64-bit capable. See related Apple documentation: How to tell if your Intel-based Mac has a 32-bit or 64-bit processor?
Apple is no longer supporting 32-bit hardware with their latest operating system, Mac OS X 10.7 (Lion), so it makes sense for us to follow suit.
Current recommendations and future guidance
Our current recommendation for the best Photoshop experience is to use 64-bit hardware and Operating Systems, specifically Mac OS X 10.6.x (Snow Leopard) or 10.7.x (Lion) for Macintosh and Windows 7 64-bit for Windows PCs.
We’re actively working with Apple to create a great Photoshop experience with future releases of OS X, including the recently announced Mac OS 10.8 (Mountain Lion).
We’re also working with Microsoft to also create a great Photoshop experience with Windows 8 for when it becomes available ..."