Trying to update my teradata driver from 13 to 15

After following the directions on this page, I cannot get my Teradata JDBC driver to update. Thoughts? Hardware: MacBook Pro (Retina, 13-inch, Late 2013) 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3 Intel Iris 1536 MB Software: Aqua Data Studio 18.0.3 Build #: 53490 Built on: 2017-Mar-09 05:40:14 PM