I'm using Mac OS Sierra 10.12.6 and LyX Version 2.2.3.
So for configure I install with home brew this recommended programs:
brew cask install basictex
brew cask install texmaker
I user the basictex because has everything I need, the mactex is very big.
If you prefer install everything install mactex:
brew cask install mactex
Go to the menu LyX > Preferences > File handling > File formats:
- format choose "PDF (pdflatex)"
- set viewer to "open -a Preview"
Apply, Save and close.
So on the menu I click on Tools > Reconfigure.
Then the LyX reconfigure automatically everything on terminal.
Wait for a while until reconfigure everything.
So after this click on Document > (Visualize Other formats) > PDF (pdflatex) or CMD + R(this command isn't accessible everytime so I recommend to get the first option).
And wait for a while and shows the pdf with Pre-visual.app.
Very nice and I haven't to install the Acrobat Reader Uhull!