As this is experimental beta release of 099, you may run into bugs, issues, or non-compatible changes in upcoming builds. Official 088 builds are recommended for projects where stability and no surprises are most important!
We want to get the new 099 features into the hands of many people and accelerate 099 into a production ready state. Give it a try if you have time to experiment and check out the new goodies.
Here's some of the many new features for 099
TouchDesigner now available on macOS (10.11 or later)