After I restored an old version via Timemachine the version 7 was working again. After that I did a fresh download of the latest version and reinstalled the program; now the scope was recognised again, so problem solved.

I updated version 7 to the latest version 7.0.86.9658, but now my PicoScope 3203D MSO with PS3000A MacOSX Driver, 2.1.68.2724, Firmware-versie: 1.7.5.0 / 1.0.66.0 (as reported in version 6) is not supported anymore. It was working with the previous versions! Can the PicoScope model added again to ve...