@User Marcuss-iMac-5:~ marcus$ uname -a Darwin Marcuss-iMac-5.fritz.box 18.7.0 Darwin Kernel Version 18.7.0: Mon May 3 20:41:19 PDT 2021; root:xnu-4903.278.68~1/RELEASE_X86_64 x86_64 Marcuss-iMac-5:~ marcus$ uname Darwin MacOS Mojave. netclient-install.sh only checks for "darwin" but not "Darwin".