[[AppleAfter acquiring NeXT, Inc.|Apple]]'s [[macOS|Mac OS X]] operating system uses a central window server (created entirely by Apple) that caches window graphics as bitmaps, instead of storing and executing PostScript code.{{Citation needed|date=February 2018}} A graphics library called [[Quartz 2D]] provides PostScript-style imaging using the PDF rendering model (a subset, plus tweaks, of the PostScript model), but this is used by application frameworks—there is no PostScript present in the Mac OS X window server. Apple chose to use this model for a variety of reasons, including the avoidance of licensing fees for DPS and more efficient support of legacy [[Carbon (API)|Carbon]] and [[Classic (Mac OS X)|Classic]] code; [[QuickDraw]]-based applications use bitmapped drawing exclusively.
