Hi ,
$ otool -L /path/to/your.appex returns:
/usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 307.5.0)
/usr/lib/libz.1.dylib (compatibility version 1.0.0, current version 1.2.8)
/System/Library/Frameworks/Security.framework/Versions/A/Security (compatibility version 1.0.0, current version 57740.51.2)
/System/Library/Frameworks/SystemConfiguration.framework/Versions/A/SystemConfiguration (compatibility version 1.0.0, current version 888.51.1)
/usr/lib/libresolv.9.dylib (compatibility version 1.0.0, current version 1.0.0)
/System/Library/Frameworks/Foundation.framework/Versions/C/Foundation (compatibility version 300.0.0, current version 1349.63.0)
/usr/lib/libobjc.A.dylib (compatibility version 1.0.0, current version 228.0.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1238.50.2)
/System/Library/Frameworks/CFNetwork.framework/Versions/A/CFNetwork (compatibility version 1.0.0, current version 811.4.18)
/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 1349.64.0)
/System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices (compatibility version 1.0.0, current version 775.19.0)
/System/Library/Frameworks/NetworkExtension.framework/Versions/A/NetworkExtension (compatibility version 1.0.0, current version 1.0.0)
Thanks and regards.