Failed to download during ./Setup.sh libc.dylib (DllNotFoundException)

  • Still not fixed in 4.26.
  • Flag UE_USE_SYSTEM_MONO still undocumented.
  • Mono 6.12 would fail anyway because versions >5 are not properly treated. I fixed it in Engine/Build/BatchFiles/Linux/SetupMono.sh by extending the following line: if [ ${MONO_VERSION[0]} -ge 6 ] || [ ${MONO_VERSION[1]} -ge 0 ] || [ ${MONO_VERSION[2]} -ge 2 ]; then