macOS Sierra with Kodi 17.2.rc1 jumps out Kodi

MACbook Pro with macOS Sierra 10.12.3
Kodi Version 17.2.rc1 (20170410-7f7f7e8) also Kodi 17.1 used ( same result )
Used PVR client: PVR IPTV Simple Client
PAY for TV channels
This works always OK
Now
Problem: during looking to TV channel he jumps out of Kodi
A few channels
After a few second looking to the channel.

Already installed new Kodi first 17.1 later 17.2 and than newest nightly version 17.2 rc1
Same results

I want deinstalled everything from Kodi and install it new
My question: How can I get everything away from my MAC and start fresh

I hope you can help me