Kernel panic after changing the system definition

[OniSenshi]

Hello everyone, I have a little problem with my installation. I used MultiBeast, and everything worked fine, until I changed the system definitions !! It was recognized as a macpro 3,1 and I chose the 5,1, then I rebooted but I had a kernel panic !!
I don't know how to resolve it, I have downloaded a lot of things and have a really slow internet connection, so I'd like to be able to recover everything.

Thank you.

 

[OniSenshi]

When I switched the system definition, I also changed the chimera theme, but I don't think this is the reason, so it is why I didn't mention it before.

Thanks in advance

 

[samisnake]

appletymcedriver kernel panic because you used macpro5,1.

boot in with safe mode (-x) and either delete appletymcedriver.kext from /S/L/E or change back to macpro3,1

 

[OniSenshi]

Thanks a lot, it worked !!