The model of my personal iPad is MD367B/A 

For the iPad/s, what is the value for "Model" in General->About?

Thanks.

medabit wrote:

Hello,

iOS Metal is supported by Vuforia 5.5.9. Please make sure that you are using a mobile license key.

Thanks, Dave

Yes, I'm using a mobile license key (starter edition). When I run the Vuforia Image Targets Metal sample I get the "Device not supported" error on iPad (both on iOS 8 and iOS 9) but not on iPhone (no error with the OpenGL sample).

Hello,

iOS Metal is supported by Vuforia 5.5.9. Please make sure that you are using a mobile license key.

Thanks, Dave