When you install Horizon FLEX Client for Mac (Fusion Pro) with a Horizon FLEX license key, you can use Fusion Pro to access your Horizon FLEX virtual machine on your Mac. You access all Fusion Pro features through the main Fusion interface. Host System Requirements for Fusion ProThe physical computer on which you install Fusion Pro is called the host system and its operating system is called the host operating system. To run Fusion Pro, the host system and the host operating system must meet specific hardware and software requirements. Install or Upgrade the Horizon FLEX Client for MacYou install or upgrade the Horizon FLEX Client for Mac (Fusion Pro) in the same way you install other macOS or Mac OS X applications. Download a Horizon FLEX Virtual Machine with Fusion ProIf your administrator told you to download the Horizon FLEX virtual machine, you must connect to the Horizon FLEX server and download the virtual machine to your Mac before you can open it in Fusion Pro. Open a Horizon FLEX Virtual Machine in Fusion ProIf your Horizon FLEX virtual machine is on a USB device or is deployed to your Mac, you must register it with the Horizon FLEX server. You can then open it in Fusion Pro. Using Mac Keyboards in a Virtual MachineBecause PC and Mac keyboards differ, you must press certain key combinations to enable certain PC commands on a Mac keyboard. Suspend and Resume a Virtual Machine in FusionThe suspend and resume feature is useful to save the current state of a virtual machine and continue work later from the same state, even if you quit Fusion in the interim. Power Off a Virtual Machine in Fusion ProWhen you shut down the guest operating system in your virtual machine in Fusion Pro, the virtual machine is powered off. Where to Find More Information About Fusion ProThis document provides basic information about using Fusion Pro. You can find more information about using Fusion Pro at the following self-help sources.