Hi, Context: I developed a streaming player and I have an issue after signing my binary with entitlements. Issue: After building my player without any signature, the player runs and plays a stream. After signing my player (binary and its shared libraries) without any entitlements, the player runs but fails to play a stream. Failure is due to a shared library which needs to access hardware routines. This issue is known and it seems the shared library needs entitled options to run (com.apple.security.cs.allow-jit and com.apple.security.cs.allow-unsigned-executable-memory) After signing my player (just the binary) with entitlments and shared libraries without entitlements, player is killed without reason (error code or message) at the beginning. Command used: to sign shared libraries codesign --deep --force --options runtime --verbose -s "..." -i "..." player.bin to sign player binary codesign --deep --force --options runtime --verbose --entitlements ./entitlement.plist -s "..." -i "..." player.bin Entitlements file used: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key> com.apple.security.cs.allow-jit</key> <true/> <key> com.apple.security.cs.allow-unsigned-executable-memory</key> <true/> </dict> </plist> Tests done: I removed quarantine extended attribute (to be sure) I verified my signatures (binary and shared libraries) codesign -vvvv <binary and shared_libraries> I verified my entitlements codesign --display --entitlements :- player.bin Questions: 1/ How to know why my player is killed (an error code, message, ...) 2/ Do I use correctly entitlements which seem being the problem - Is entitlement file ok ? - Do I install entitlements file somewhere specific (In my mind it is useless after the signature) ? 3/ Perhaps entitlements I want to use have some environment constraints or prerequesites ? If so where I can find them ? If you need more information, don't hesitate. Thanks a lot