We've just tested our Tessellation sample, together with the Unity's Tessellation samples provided
here, in the latest version of MacOS, and it seems that out sample is working in editor and also in a build ( Metal ), while Unity's own snippets are giving errors, so we're not entirely sure on what could be causing the reported issue.
We used Unity 2018's latest stable release, 2018.2.16f1, and the latest ASE version currently
available from our website.
In order for us to help you any further and to successfully debug any issues you might have with the ASE, we'll need a sample project with the issue present, so that we can proceed to investigate it using the same data as you.
Samples can be shared through
[email protected], if you prefer.