Hi Athinodoros,

I don’t upload the images myself. All of them were uploaded by Techsviewer. I usually just go to their site to get the latest link. Perhaps giving them their site/post is more effective? They also have a tutorial on how to get a macOS VM going along with the download link. In fact, they were one of the resources that helped me figure out my specific implementation.

https://techsviewer.com/install-macos-high-sierra-virtualbox-windows/

Hope that helps!