$ sudo pkg update
Password:
------------------------------------------------------------
Package: pkg://solaris/release/evaluation@1.0,5.12-5.12.0.0.0.115.0:20170111T175931Z
License: evaluation

This software has been made available for evaluation purposes only.
See http://www.oracle.com/technetwork/server-storage/solaris11/technologies/foss-evaluation-program-2586275.html for further information.

            Packages to remove:   1
           Packages to install:   3
            Packages to update:   2
            Services to change:   1
       Create boot environment:  No
Create backup boot environment: Yes

pkg: The following packages require their licenses to be accepted before they can be installed or updated:
----------------------------------------
Package: pkg://solaris/release/evaluation@1.0,5.12-5.12.0.0.0.115.0:20170111T175931Z

License: evaluation
  License requires acceptance.

To indicate that you agree to and accept the terms of the licenses of the packages listed above, use the --accept option.  To display all of the related licenses, use the --licenses option.

$ sudo pkg --accept update
pkg: illegal global option -- accept
Try `pkg --help or -?' for more information.