Ubuntu to Mac: Ctrl+Click ---> Right Click

sudo nano /usr/share/X11/xorg.conf.d/50-synaptics.conf 

Under the section "Input Class" edit the options for TapButton so you have

Section "InputClass"

        Option          "TapButton1" "1"
        Option          "TapButton2" "3"
        Option          "TapButton3" "2"

This will enable right click and tap to click.


Both given answers didn't work for me. What worked for me was:

synclient RightButtonAreaLeft=1

Put it in some file that is run at startup (e.g. .bash, .zsh)

Source: https://bugs.launchpad.net/ubuntu/+bug/861694