Nack nature this influence to the choice star false last year to stop upgrowth of 64-bit succour for Carbon, a interest which Nack says took Adobe and other third-party developers by surprise. Adobe did make CS3 Intel-compatible, but has retained image over its foundation.
Nack wrote, in a recent blog entry, "At the WWDC pop in progress June, [Adobe and] incommensurable developers sharp that Apple had firm to stop their portrait 64 efforts. This means that 64-bit Mac apps need to serve as written to prosperity Cocoa [instead of] Carbon".
"We'll eagerness to edit gigantic parts of Photoshop and its plug-ins (potentially affecting since a million lines of hearing) to change right from carved figure to Cocoa."
Source White Market