Run a system wide keylogger I'd like to run a system wide keylogger (For purely educational/backup purposes of course) on Mac OS Sierra, how can I do it without buying expensive apps for that?

I've been using logKext from github but it stopped working after upgrade from El Capitan.

I almost got it working, but console is showing me Error: Daemon must run as root., I've tried to sudo chown root each file but to no use. 

Any ideas? Thanks!

Update:
I got it running but it's not logging any keys. Console shows no errors connected with it.
try to:
rebbot with CMD + R 
launch Terminal
I guess system gonna ask for the administration password
then type : csrutil disable
then reboot your system normaly
and instal Logkext