I found your board on youtube. I had a intel processor and switched to a new pc and now I had to get a new mac os installed on virtualbox. I followed this guide: viewtopic.php?f=51&t=4637
But unfortunately I can't solve the "startup.nsh" error. I think I did everything correctly and If I am watching my boot order, Clover is the first point. Do I missed to change anything else except the steps written in this guide? I think the only thing which is different at my configuration is "Version". There I couldn't find some x64 version of mac so I just changed it to "Other/Unkown" but I don't think this causes the error?
Here are some screenshots:
Thanks for your help!