jggimi is right. You are running a 4.6-
release kernel.
Running the command:
$ sysctl kern.version
...displays the same top few lines as
dmesg(8). It will specifically state 4.6-
stable if you have manually built the
-stable branch, or display 4.7-
current if you have installed a recent snapshot. The fact that
nothing hyphenated is displayed in the output above means that you are running 4.6-
release.
Given the information you have provided thus far, installing a
-current snapshot appears to be your best bet.