09-07-2014, 01:57 AM
Bluetooth isn't initialized until after the boot-chime.
Your friend may have better luck with the wireless keyboard if he waits until after that chime to hit a key.
...
Have you got a laptop to bring over to help?
I'd boot into target mode, connect to a laptop and use that laptop to clone the iMac's boot drive to an external hard drive.
Then Boot the iMac into the Recovery volume and use that to erase the iMac's internal drive and install a clean copy of the OS.
After creating a new admin account on the iMac (with a unique username not previously used on the iMac), I'd use the Migration Assistant to migrate only user accounts, network settings and applications from the backup.
Your friend may have better luck with the wireless keyboard if he waits until after that chime to hit a key.
...
Have you got a laptop to bring over to help?
I'd boot into target mode, connect to a laptop and use that laptop to clone the iMac's boot drive to an external hard drive.
Then Boot the iMac into the Recovery volume and use that to erase the iMac's internal drive and install a clean copy of the OS.
After creating a new admin account on the iMac (with a unique username not previously used on the iMac), I'd use the Migration Assistant to migrate only user accounts, network settings and applications from the backup.