This news can be taken in one of two ways…

As we noted a couple of months ago, Apple has deprecated OpenGL and OpenCL on macOS and iOS. They want developers to write their software in Metal, which allows them to have more control over the whole stack (and this makes it slightly more difficult to port to competing platforms).

Citing this decision, Autodesk has dropped support for Alias and VRED on macOS. You will be forced to use 2019.0 on High Sierra, at the latest, unless you switch to Windows.

On the one hand, Autodesk is a big company to act against Apple’s decision. On the other hand, they are doing it with Alias and VRED, which are more for industrial users. Should they follow this up with, let’s say, deprecating Maya, then that would be a huge blow to Apple’s core professional audience. But they aren't, and the macOS version of Alias and VRED might have been on the fence for a while, particularly with Autodesk’s ongoing losses.

So it might not be a big deal, but it’s a clear, explicit example of a product team packing up in response to Apple’s demands.