MATLAB extends the DYLD_LIBRARY_PATH and DYLD_FRAMEWORK_PATH environment variables that it passes into the shell, in order to add on the path to MATLAB libraries (and to Java libraries).
osascript is a program which has extended privileges ("entitlements") assigned to it.
When a program has extended privileges assigned to it, the operating system needs to ignore any shell variables about the dynamic library paths, so that a malicious user does not substitute their own library for one of the expected system libraries, thereby getting their own code executed in a privileged context.
When a program with extended privileges is executed, it gives a warning that it ignored the dynamic library variables.
The easiest workaround would be
[status, result] = system('unset DYLD_LIBRARY_PATH DYLD_FRAMEWORK_PATH; osascript getComment.scpt "file:path:to:rabbit.png" ');
