https://devzone.nordicsemi.com/f/nordic-q-a/67250/unable-to-open-multi-image-nrf9160-projects-in-sesI used the &quot;Toolchain manager&quot; in nRF Connect for Desktop v3.5.0 to install nRF Connect SDK v1.3.1 on a macOS Catalina 10.15.7 system. This installed SEGGER Embedded Studio for ARM (Nordic Edition) V4.52. I am able to open the &quot;zephyr/samples/basicen-USTelligent Community 13Tue, 20 Oct 2020 14:08:33 GMThttps://devzone.nordicsemi.com/thread/275969?ContentTypeID=1Tue, 20 Oct 2020 14:08:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:519a8ca4-fde5-4a70-9ab0-9d3d88d73ddeCarl Richard<p>Hello, Ivo!<br /><br />I can reproduce issue here and I&#39;m looking into it. It seems to be some erros during the toolchain installation so I&#39;ll have a chat with the developers about this aswell.<br /><br />Note that the Toolchain manager on macOS is experimental, so I would recommend that you do a manual installation by following the <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/gs_assistant.html#installing-the-gsa">Getting Started Assistant</a> in the meantime.<br /><br />Best regards,<br />Carl Richard</p><div style="clear:both;"></div>