Hi, For the purposes of iteration speed in development builds, on an iPhone in development mode, I am attempting to use hot reloaded dylibs. The goal is that the app is rarely fully restarted and small code changes can be applied quickly, drastically reducing iteration speed. For this purpose I have a socket server on my Mac that sends changed dylibs to my app on my iPhone. This works great on Mac, however on iOS i am running into codesigning problems. I am using the following to codesign the dylib: codesign -f -s *** --timestamp=none testlibrary-ios.dylib I am placing the downloaded dylib in this folder: const char* cachedirectoryPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0] UTF8String]; dlopen gives me the following error: dlopen(/var/mobile/Containers/Data/Application/67A3D31B-6F72-4939-9E7F-665FC78CDC61/Library/Caches/testlibrary-ios.dylib, 0x000A): tried: '/usr/lib/system/introspection/testlibrary-ios.dylib' (no such file, not in dyld cache), '/var/mobile/Containers/Data/Application/67A3D31B-6F72-4939-9E7F-665FC78CDC61/Library/Caches/testlibrary-ios.dylib' (code signature invalid in <78A101AD-D756-3526-8754-8B7F4925DE90> '/private/var/mobile/Containers/Data/Application/67A3D31B-6F72-4939-9E7F-665FC78CDC61/Library/Caches/testlibrary-ios.dylib' (errno=1) sliceOffset=0x00000000, codeBlobOffset=0x0000C2E0, codeBlobSize=0x00004990), .... Is loading a dylib like this on iPhones in development mode possible? Any idea what is going wrong with codesigning or installing the dylib? (Obviously this code is never deployed in an app that goes on the AppStore)