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My iPhone is now up to 13.5 so I tried adapting the advice above thus: ln -s 13.2 13.5 but running my Flutter app on my iPhone didn't work. Has anybody got Mohave Xcode (latest supported xcode on Mojave is 11.3.1) to run on an iPhone device running 13.5.1 ? Also, am confused about the tip re fixing a potential "dyld_shared_cache_extract_dylibs failed" error - my ~/Library/Developer/Xcode directory does not contain an iOS DeviceSupport directory? It contains: $ pwd /Users/MYNAME/Library/Developer/Xcode $ ls DerivedData DeveloperPortal 7.2.db UserData DeveloperPortal 7.2.1.db DeveloperPortal 7.2.db-shm iOS Device Logs DeveloperPortal 7.2.1.db-shm DeveloperPortal 7.2.db-wal watchOS DeviceSupport DeveloperPortal 7.2.1.db-wal GPUToolsAgent.sock so I cannot create the empty file .processed_dyld_shared_cache_arm64e. Am I supposed to actually create the entire missing path iOS DeviceSupport/13.2/Symbols/System/Library/Caches/com.apple.dyld too?