Launch CrossOver and from the Install screen, click Install an Unlisted Application.
Click Edit to open the installer file dialog.
Locate the installer file for the program you are installing. Once you have selected the file, click Choose Installer.
Click Edit to open the Bottle dialog.
Enter a name for your bottle.
Select a bottle type from the list of bottles and click Done to proceed.
CrossOver creates a bottle for the Windows application's files and then runs the program's installer. Follow the installation steps just like you would on Windows. Typically, leaving the install options at their defaults is fine.
Once the installation is complete, Crossover displays the contents of the new bottle. Double-click the application's icon to run your program.
If no launcher icon is created, try manually launching the application using Crossover Run Command.
Instructions for CrossOver Mac 14.x and earlier
You can also watch this tutorial on YouTube