To use Apache Iceberg via the Hadoop Catalog on Databricks, it was found to work with the following settings:

- Use a Databricks Runtime version of 12.2LTS or earlier. 
- Set the access mode to "No isolation shared" (the mode where Unity Catalog cannot be used).
- Use a library compatible with Java 8 (i.e., an Iceberg library earlier than version 1.6.1).
- Apply the necessary Iceberg-related settings in the Spark configuration.