On 2016Sep14, at 11:27, Sergio Celani <sergiocel...@gmail.com> wrote: > > Thanks for the reply. > > One more question. To install Lyx, I must first install the GPG signature > file? What is the utility of this file ? > > Sorry, I'm just learning to use this operating system > > Sergio
No, but you need to allow Mac OS to install programs that are not from the Apple Store in System Preferences > General > Allow Apps downloaded from:. Chose Anywhere, install Lyx and then select what you like to have as your standard security level. Anders
