My G5 Quad is running Leopard and currently uses a generic USB Bluetooth dongle I got on eBay a while back. It seems to work fine for most things, but I now want to use a wireless Mighty Mouse I got in CEX for a steal. But the problem is the cursor staggers and jitters about when I connect it to the G5. It isn't a fault with the mouse because it works flawlessly with my MBP under Sierra. So it's clearly something not right with the adapter. Can anyone suggest a relatively cheap alternative that will ensure proper functionality with the G5?