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Cincom VisualWorks for macOS Catalina 10.15.5

Posted on in Categories Cincom, Support, VisualWorks

On May 26, 2020, Apple released a Catalina update (10.15.5) that breaks compatibility with our VisualWorks macOS VM.

If you run Cincom VisualWorks on macOS and perform this latest Apple update, you will run into an issue where VisualWorks will no longer run due to changes from the update to the macOS.

Cincom Smalltalk engineering has addressed this compatibility issue, and customers/partners can request an updated VM that solves the problem. Please visit to contact support and request a compatible macOS VM. 

If you have any questions, please contact the Cincom Smalltalk Product Team at