Thanks for sharing @SCENEE I've just updated to macOS Sonoma and the command works for me now too! macOS Sonoma 14.1.1 Xcode 15.0.1 iOS 17.0.3 However... icons smaller than 1024x1024 are not extracted correctly.

Unfortunately, it seems that the appIcon command has broken again. macOS Sequoia 15.0 Xcode 16.0 (16A242d) iOS 17.6.1 Any kind of combination of arguments results in: "ERROR: CGImage was nil when attempting to write to a destination. (com.apple.dt.CoreDeviceError error 6007 (0x1777))" This is the same error code and description as my original post. Edit: I've filed bug report FB15372764 for both issues. Edit II: Just updated to iOS 18.0 and the appIcon works again. It still has the pixel offset :-( except for 1024x1024 size.

Hi Quinn, I see that I never replied to your message. The goal of listening to Darwin notifications is to communicate between an iOS test suite and macOS host. The macOS host controls the test suite, e.g. when a button is pressed the test suite performs a certain test. I wanted to use notifications to indicate that a test has been completed. By now, I have found some workarounds, but I can still see the value in being able to successfully observe iOS notifications from macOS.