Hi, I recently set my 86 yr old mom with a new macbook air remotely, she loves it but she has trouble double-clicking. I ordered her one of these https://www.amazon.com/LENTION-Chro...id=1520656483&sr=1-1&keywords=mac+usb+adapter with a microsoft cordless mouse. The mouse works plugged into it, she can handle single clicking, but double-clicking just isn't working with her shaky hands, anybody know of any apps or ways to help her? I'm a pc person so I'm not very adept at all the settings in the mac.