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nrf sniffer 3.0 doesn't show in list of external capture modules. Why?

Kind folks, This seems to be a recurring question. I suspect the Wireshark/nrf-Sniffer setup is delicate enough that minor changes/upgrades in any of the components causes a problem.

(Following Nordic's installation instructions) Currently I get all the way through the Nordic dev kit firmware loading, Wireshark installation, nrf Sniffer plugin installation and even the command line test of the nrf Sniffer plugin components (as Nordic's instructions direct), but Wireshark refuses to recognize and list the plugin among its available interfaces.

Here's my configuration:

MacBook Pro 10,1, running macOS 10.15.4 JLink V664 Python3, v3.8.2 pip3 v20.0.2 pyserial 3.4 Wireshark 3.2.2 nrf_sniffer_for_le_3.0.0_l29d2b3.ziip Installation directory for nrf Sniffer files: /Applications/Wireshark.app/Contents/MacOS/extcap/

Does anyone have any advice on how to fix this (or even to start the diagnostic process)?

TIA,

Mike

PS: I'm a bit desperate to be able to be able to sniff Bluetooth LE packets. Trying to help an international team working on iPhone and Android apps for Contact Tracing for fighting COVID-19!