In rare cases, a USB device disconnects itself before VMware Fusion can recognize it.

When you plug in a USB device, the VMware Fusion EasyConnect dialog box appears, but disappears before you have an opportunity to take an action. The USB device is then not visible to either your Mac or your virtual machine.

Some USB devices disconnect very quickly if they do not receive an immediate response upon connection. Occasionally, VMware Fusion USB EasyConnect does not produce a response in the time required by these USB devices.

To work around this problem, you must configure the virtual machine so that VMware Fusion connects unknown devices without first having to ask about the type of connection.


Shut down or power off the virtual machine.


From the VMware Fusion menu bar, select Window > Virtual Machine Library.


Select a virtual machine and click Settings.


Click USB & Bluetooth.


Click to expand Advanced USB options.


If the first option is set to Ask what to do change the setting to Connect to this virtual machine or Connect to your Mac.


Start up the virtual machine.

Plugging in a USB device results in it being connected to the virtual machine or Mac, depending on your setting, without going through the USB EasyConnect dialog. The device is also visible to the VMware Fusion interface, so you can see it in Settings > USB & Bluetooth.