You need to replace the /usr/lib/libpq.5.dylib library because its version is too old.
Here’s my solution to this problem:
$ sudo mv /usr/lib/libpq.5.dylib /usr/lib/libpq.5.dylib.old
$ sudo ln -s /Library/PostgreSQL/9.4/lib/libpq.5.dylib /usr/lib
You need to replace the /usr/lib/libpq.5.dylib library because its version is too old.
Here’s my solution to this problem:
$ sudo mv /usr/lib/libpq.5.dylib /usr/lib/libpq.5.dylib.old
$ sudo ln -s /Library/PostgreSQL/9.4/lib/libpq.5.dylib /usr/lib