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The NSImageCacheMode EnumeratedType describes how an NSImage caches its data. Note that all image caching is done by NSImage, not by NSImageRep.

You can get an image’s cache mode with -[NSImage cacheMode] and change it with -[NSImage setCacheMode:].

Due to a bug in NSPDFImageRep, you should always draw it without caching. There are a couple ways to do this:

You can also use NSImageCacheAlways to force the image to be preloaded before drawing.