Rekordbox runs terrible on OS X Sierra

I wanted to use Rekordbox 4.3 on my Macbook pro with 8 gigs ram I5 Processor and a Samsung SSD disk drive but it is Extreme Laggy and unusable for me  

What should I do...  I have performed a clean install with a completely new Libary The version 4.2 or 4.1 (I don't know which was on my mac before) worked perfectly fine...