your mod crashes on the client but not on my server ( on mac)
So my problem is not with the java java 6 because I board her 8 proves that I was right

I have the same problem

The server uses on-board java, it doesn't ship any java, the client uses the launcher, which ships Java 6 by default, that's where #67 comes into play...

If you REALLY can't get it to work in any way, I can only suggest using a custom launcher like MultiMC:
https://multimc.org/