I had an issue where the Virtual Box VM for Windows 10 wouldn’t unzip on my Mac. Advice that worked for me came from Twitter: use “The Unarchiver. Also better to download the PC version (will still work) until we fix an issue we’ve detected in it.”
Worked for me and my colleagues! http://wakaba.c3.cx/s/apps/unarchiver
https://twitter.com/molant/status/636631738521751552