Cubase 8.5.15 pretty much unusable

Hello, everyone. i upgraded last night to cubase 8.5 from 7.5. I was just wondering if anyone is going through what i am going, and if anyone know if this is going to be fixed anytime soon. I own a macbook pro retina 15 its 10 months old. i am having massive graphic issues (Lag). My audio display instead of showing me wave forms, it is all black. on my Media bay when i am previewing it is very slow at loading. ( No its not scanning any folders). The grids sometimes disappear. also when there are more than a few tracks it gets extremely laggy,and there are no vsts in the project just WAV files making the creative process very frustrating. i had 0 ISSUES on my 7.5 cubase. :cry: :cry: :cry: :frowning: :frowning:

Thanks and let me know if anyone can give me any advice?