Downloading, installing and running the desktop app works as expected. When I go to the Lektor menu and select "Install Shell Command" there is a popup notifying me that installing the shell command requires admin rights. No matter if I click no or yes, nothing happens, no password request, nothing.
In the terminal, when I type
lektor quickstart
I get
-bash: lektor: command not found
macOS 10.12.5, Python 2.7 and 3.4 (Anaconda)
Solution (by Gonzalo Peña-Castellanos, thanks!):
$ conda install lektor -c conda-forge