nRF Connect 3.4.1 for Mac: Error occured when get serial numbers

[espenwe]

Hi,

Just installed nRF Connect v3.4.1 on a macOS Catalina and get the following error message when starting any of the apps:

Error while probing devices: Error occured when get serial numbers. Errorcode: CouldNotCallFunction (0x9) Lowlevel error: INVALID_OPERATION (fffffffe)

I've tried both reinstalling and downgrading the app, but still get the same error message. 

Environment/machine details:

macOS Catalina, Version 10.15.5, MacBook Pro (16-inch, 2019), CPU 2.4 GHz 8 core Intel Core i9

[Ivan Herrera]

What version does JLinkARM.dll return when you enter nrfjprog -v in the terminal?

[espenwe]

Hi. I downloaded and installed the command line tools separately now, then started nRF Connect again, and now it works. 

Thanks for the quick response!

[dugopark]

For anyone looking for the command line tools, here's the link. I was having a similar issue and installing the command line tools fixed it for me as well.

https://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF-Command-Line-Tools/Download#infotabs