https://devzone.nordicsemi.com/f/nordic-q-a/53127/cant-connect-to-devices-via-lte-link-monitorIm trying to connect Thingy:91 and Thingy:52 to my mac book pro using USB cable to use AT config commnads. In both cases I&#39;m getthing the following messages in the log window: 15:14:51.883 Application data folder: /Users/angelo/Library/Applicationen-USTelligent Community 13Fri, 11 Oct 2019 08:35:55 GMThttps://devzone.nordicsemi.com/thread/214531?ContentTypeID=1Fri, 11 Oct 2019 08:35:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f4335d0d-8fee-4b35-9094-9869d5490836Heidi<p>Hi, if you take a look at&nbsp;<a href="https://github.com/NordicSemiconductor/pc-nrfconnect-core/#linux-and-macos">this page</a>, the documentation states the for macOS the J-Link driver needs to be separately installed.&nbsp;<span>Download and install it from&nbsp;</span><a href="https://www.segger.com/downloads/jlink" rel="nofollow">SEGGER</a><span>&nbsp;under the section&nbsp;</span><em>J-Link Software and Documentation Pack</em><span>. Without it when running the apps you would otherwise get error messages when running the apps like&nbsp;</span><code>CouldNotFindJprogDLL</code><span>,&nbsp;</span><code>CouldNotOpenDLL</code><span>&nbsp;or&nbsp;</span><code>JLINKARM_DLL_NOT_FOUND</code><span>.</span></p> <p><span></span></p> <p><span>Side note: the Thingy:52 does not have a modem so one can&#39;t use AT commands to communicate with it.&nbsp;</span></p> <p><span></span></p> <p><span>Best regards,</span></p> <p><span>Heidi</span></p><div style="clear:both;"></div>