We are aware of some issues with Unity and macOS 10.13 (High Sierra) beta 1 release. We recommend waiting before updating to this macOS version until we finish investigating reported issues, one of which being trouble with assets appearing in Project View. Check back here soon – we'll keep updating this post as we learn more.
P.S. you don't need to upgrade to macOS 10.13 to try new Xcode or iOS 11. Just keep using 10.12.
P.P.S. if you still eager to try macOS 10.13, consider...
Unity and macOS 10.13 (High Sierra)
P.S. you don't need to upgrade to macOS 10.13 to try new Xcode or iOS 11. Just keep using 10.12.
P.P.S. if you still eager to try macOS 10.13, consider...
Unity and macOS 10.13 (High Sierra)