My not so young and not so computer savvy parents bought their first Mac about 18 months ago (whoo-hoo!) and it's been mostly problem-free, thank goodness (one situation necessitated a visit to their local Apple Store, where they were really lovely to my dad, and fixed the machine.) In the last two days, they are having a problem with the iMac not being able to detect the wireless mouse. The shut it off and turn it on again worked temporarily, but it's no longer working. No need for a new battery, either. I can't get over there until mid-week, and I admit I'm no expert with the iMac, only having worked on laptops. Is there any troubleshooting advice you may offer me in the meantime so that I can hit the ground running when I see them? I figure it's a Bluetooth issue, but... Many thanks.