Currently Being ModeratedNov 16, 2012 12:44 PM (in response to TWH3)
When you tried the USB PC KB, did you have wireless one off or batteries removed, sounds like it thinks a Modifier key is always pressed.
Currently Being ModeratedNov 16, 2012 1:45 PM (in response to BDAqua)
The problems happened before I attached the PC keyboard, during and after.
The presence of the PC keyboard appears to have no impact.
What's so odd, is that all behaves OK when commtrolling the iMac remotely via LogMeIn
I'm redownloading Mountain Lion from the MAS - hoping that might fix it, but a shame I can't take advantage of ML's wizzo Restore functionality.
Have also booked myself in for a Genius apppointment, but as it's a 40 mile, 2-3 hour round trip on a Sunday I'd rather not have to do!
Currently Being ModeratedNov 16, 2012 3:57 PM (in response to BDAqua)
Man.. I is such a fool sometimes.
So I reinstalled ML - which on my cruddy 4 MB ADSL connection took a fair while. And still the problem was there.
Then I tried one small thing... take the batteries out of the trackpad and then try using the wired mouse. BINGO.
After a few more tests it has bceome clear that it was the trackpad that was at fault. Not my iMac, not my OS. Having it on would screw up what the wired mouse was trying to do. Should've checked that HOURS ago.
I have a spare trackpad (I used to have a Mac from work and bought myself a trackpad for it. No longer have a Mac for work as a switched employers, but ironcially willbe getting one next week!). I have installed the 2nd trackpad and all works fine.
Lesson learned - do more thorough diagnostics!
I'm off to cancel my Genius Bar apppointment