Tosibox Key Software Release 3.1.4 is available (MAC OS X only, from Version 11)

• Support for OS X 11 (Big Sur) – Layer 2 is not supported in the TOSIBOX® Key client when installed on macOS Big Sur (version 11 and newer) running on ARM processor. See our helpdesk article for more information.
• Improved stability

Layer 2 is not supported in the TOSIBOX® Key client when installed on macOS Big Sur (version 11 and newer) running on ARM processor and possibly in the future versions for other processor architectures, where enabling Layer 2 support requires accepting a kernel extension signed by Jonathan Bullard.

This has no effect on Layer 3 support in the TOSIBOX® Key client when installed on macOS Big Sur (version 11 and newer) running on ARM processor.