Why my genymotion block in the start the virtual device?

Last verified against genymotion.com:

Your virtual device may be blocked by the macOS firewall, a port conflict, or an unsupported setup. On macOS, QEMU is the preferred hypervisor and Genymotion uses local ports like 5555 and 6379, which can be blocked or already in use. macOS - Unable to start the Virtual Device

Check that no other app is using the same ports, especially Redis on 6379. If you are on a Mac M series, VirtualBox is not available, and older Genymotion versions or running inside a VM/server/cloud instance are not supported. macOS - Unable to start the Virtual Device