Editing Worldwide Developers Conference (section)

==== 1998 ====
In 1998, in response to developer comments about the new operating system, the ''big announcement'' at WWDC'98 was the introduction of ''[[Carbon (API)|Carbon]]'', effectively a version of the [[classic Mac OS]] API implemented on [[OpenStep]]. Under the original Rhapsody plans, classic applications would run in sandboxed installation of the classic Mac OS, (called the Blue Box) and have no access to the new Mac OS X features.  To receive new features, such as protected memory and preemptive multitasking, developers had to rewrite applications using the Yellow Box API. Developer complaints about the major porting effort to what was then a shrinking market and warnings that they might simply abandon the platform, led Apple to reconsider the original plan. Carbon addressed the problem by dramatically reducing the effort needed, while exposing some of the new functions of the underlying OS. Another major introduction at WWDC'98 was the [[Quartz 2D|Quartz]] imaging model, which replaced [[Display PostScript]] with something akin to ''display [[PDF]]''. Although the reasons for this switch remain unclear, Quartz also included better support for the extant [[QuickDraw]] model from the classic OS, and (as later learned) [[Java2D]]. Supporting QuickDraw directly in the graphics model also led to a related announcement, that the Blue Box would now be ''invisible'', integrated into the extant desktop, instead of a separate window.