Wireshark cannot find interface to nRF51 dongle

[edw]

I have used an nRF 51 dongle for capturing BLE packets on my Mac using Wireshark,, but it no longer works.
The only system change that I can recall that might affect this is that
I recently upgraded to Mac OSX Catalina Version 10.15.5, which was an incremental update.

The usb connection and dongle must be in good shape, because I am to run nRF Connect v3.4.1 - Bluetooth Low Energy successfully.

I am using nrf_sniffer_for_bluetooth_le_3.0.0_129d2b3.zip
To be sure that the problem is not related to Wireshark or its configuration, I have been testing with:
extcap/nrf_sniifer_ble.sh --extcap-interfaces

And, it is never able to find an interface.  It does not generate an error, but does not find an interface.
Can you suggest a solution and/or additional tests to run?

Thank you !

[Edvin]

Hello,

Did you flash the dongle with the appropriate FW? The .hex file you can use should be found in the nrf_sniffer_for_bluetooth_le_3.0.0_129d2b3\hex.

Depending on what version of the dongle you have, it would be either the sniffer_pca10031_129d2b3.hex or the sniffer_pca10000_129d2b3.hex. There should be a white sticker saying either pca10031 or pca10000 on the dongle.

BR,

Edvin

[edw]

We can close this case now. 

I decided to erase and re-flash the dongle. 

This allowed everything to work.

thanks for your help !