To install FontTwister on your Mac, you need CrossOver
from codeweavers installed on your Mac.
Download FontTwister here
Open the Windows application located in your Downloads folder with CrossOver.
Configure the installation like this and click on "Install":
The installation is in German. Click on "Weiter".
You do not have to change anything.
At the end of the installation you have to uncheck "FontTwister jetzt starten". Click on "Fertig".
You can find FontTwister in your Launchpad:
Click on "Continue" or click on "Register" to buy the full version.
Now you can use FontTwister.
It might be, that fonts will be displayed repeated.