The trick is to install the packages manually. The solution is similar to this:
http://line6.com/support/topic/14731-ux2-osx-1011-el-capitan-no-sound/page-6?do=findComment&comment=131047
Follow the first steps in this tutorial and install at least
POD Farm.pkg
POD Farm Common.pkg
This gave me a working POD Farm 1.12 on MacOS Sierra. I installed the other packages too, some couldn't be installed because newer versions were found on my computer.
Hope this helps. Thanks to Line6 for no support :(