The initial public release of macOS Big Sur was made available on 12 November 2020.
INSUL does not currently support macOS Big Sur.
We hope provide support for INSUL on Big Sur as quickly as we can. Unfortunately, this requires some of our third party developer tools to be updated. We are waiting on these updates at present and we understand that it may be several weeks before they are available.
We hope to provide a further update on our progress with Big Sur support in a few weeks. In the meantime, if you have any queries about INSUL on Mac, please contact your local INSUL distributor.