diff --git a/README.md b/README.md
index ad48bb37e..29383bd78 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@ An extension to the [Apache Spark](https://spark.apache.org/) framework that all
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+
 ## Why Mosaic?
 
 Mosaic was created to simplify the implementation of scalable geospatial data pipelines by bounding together common Open Source geospatial libraries via Apache Spark, with a set of [examples and best practices](#examples) for common geospatial use cases.
@@ -41,11 +42,16 @@ Image1: Mosaic logical design.
 
 ## Getting started
 
-Create a Databricks cluster running __Databricks Runtime 10.0__ (or later).
+We recommend using Databricks Runtime versions 11.3 LTS or 12.2 LTS with Photon enabled; this will leverage the 
+Databricks h3 expressions when using H3 grid system. 
+
+:warning: **Mosaic 0.3.x series does not support DBR 13.x** (coming soon with Mosaic 0.4.x series); also, DBR 10 is no longer supported in Mosaic. 
+
+As of the 0.3.11 release, Mosaic issues the following warning when initialized on a cluster that is neither Photon Runtime nor Databricks Runtime ML [[ADB](https://learn.microsoft.com/en-us/azure/databricks/runtime/) | [AWS](https://docs.databricks.com/runtime/index.html) | [GCP](https://docs.gcp.databricks.com/runtime/index.html)]:
 
-We recommend using Databricks Runtime versions 11.2 or higher with Photon enabled, this will leverage the 
-Databricks h3 expressions when using H3 grid system.
+> DEPRECATION WARNING: Mosaic is not supported on the selected Databricks Runtime. Mosaic will stop working on this cluster from version v0.4.0+. Please use a Databricks Photon-enabled Runtime (for performance benefits) or Runtime ML (for spatial AI benefits).
 
+If you are receiving this warning in v0.3.11, you will want to change to a supported runtime prior to updating Mosaic to run 0.4.0. The reason we are making this change is that we are streamlining Mosaic internals to be more aligned with future product APIs which are powered by Photon. Along this direction of change, Mosaic will be standardizing to JTS as its default and supported Vector Geometry Provider.
 
 ### Documentation