Acextract

[Rosham Rosebure]

Thefirst stop was NSPageLayout, the panel object that is responsible for displaying the panel. It was unlikely that the class would actually contain the implementation of the panel, but it was at least a starting point.

In order to actually look at the disassembled implementation of this AppKit class, I needed the actual AppKit framework binary. Since macOS Big Sur, all system framework binaries are stored merged in the dyld shared cache, rather than in separate files. But, I need them as separate files in order to actually inspect them.

To actually extract the image from the asset catalog, I needed to use a third-party tool. acextract worked perfectly on the first try, though it did need couple of additional @imports to compile on Ventura since Foundation no-longer re-exports CoreGraphics.

The assetutil manpage does contain a reference to a dump option (-d/--dump) which is curiously not present in the manpage nor is it recognized by the program. Perhaps an Apple-internal feature that is excluded from compilation in public builds?

3a8082e126