I am not 100% sure that this is a permanent fix but I’m pretty sure it should do the job. I am using Mac OS Sierra with Kodi 17: Krypton.
Below are the steps I took to resolve the issue plus an extra step if the original does not work.
Steps:
1) Delete Kodi
2) Go to the following location by opening finder, selecting the Go menu and choosing go to a new folder.
Inside that field place the following path and BE SURE TO REPLACE <your_user_name> WITH YOUR USERNAME.
/Users/<your_user_name>/Library/Application Support/Kodi
3) Empty the trash, permanently deleting everything inside.
4) Download Kodi 17: Krypton from kodi.tv
5) Install Kodi and enjoy!
**Note for user** IF the steps provided did not work, repeat steps 1 and 2 , then go through delete everything containing any reference to Kodi that was left on machine. This is the best way to ensure a clean install; however, I do not think that this step will be necessary.
Hope this helps!