I’m not sure if the update of my MacBook Air to Mac OS 26.4.1. But – it was working perfectly and then (coincidentally after the update of Mac OS) it seems to have lost the USB com ports for the DR-891. This was with WSJT-X 2.7.
So I updated WSJT-X to version 3.0.0 stable and no change. I followed the Mac OS install instructions in the WSJT-X 3.0.0 release notes but still no good.
I’m not sure how to proceed ??