1. Download Icaros Desktop and create a new Fusion virtual machine using the + key.
2. Drag and drop Icaros' ISO image or choose it. When Fusion will ask what operating system is, answer Other and select BIOS Legacy.
3. Choose "Customize Settings" (the actual name of this button might be different, sorry: I have only seen this in italian screenshots) and save the virtual machine:
4. Before starting the VM, edit settings and modify RAM and CPU, using a single core and at least 2 GB of RAM (1 GB would be enough anyway...). Add an IDE hard disk and set its size (please make it 8 GB or bigger). Leave for now the CD Drive, which will be mandatory for the installation task.
5. Start the virtual machine, run Icaros Desktop Live! and install it onto the IDE hard drive.
6. Once the installation has completed, turn off the virtual machine. Turn back to settings from the main menu bar (Virtual Machines, Settings. Or Cmd-E) and remove the ISO image from the CD drive.
To release mouse pointer from the virtual machine, press ctrl+cmd.