Once the application is started, simply press F12 (by default) to open
the console.
However, on mac's, F12 is assigned to "right click"
To solve this problem - use the following instructions:
Run Yakuake.
In a terminal, run the command
killall -9 yakuake
This is so that the default configuration files are created (only needed if you have never ran yakuake before)
Next, edit the following file
~/.kde/share/config/yakuakerc
which should look something like this
[Options]
background=true
focus=false
height=30
location=80
screen=1
steps=20
tabs=true
width=50
Add the following to the file:
[Global Shortcuts]
AccessKey=F11
And save the file.
Now, restart yakuake, and you should be able to use the F11 key to access yakuake!