How to connect Wireless Keyboard when new hdd on imac 27 I have an iMac 27 emc 2390, i just had a hdd failure, so i bought a new hdd, plug it in and then start my imac with the instal dvd in.
The point is that my keyboard isn't recognize so i can't boot on the cd so i can t reinstal the OS.
Any ideas please?

i bought a USB keyboard, plug it in, but it seems to work only when the folder ? appears. the keyboard isn't responding before that, making it impossible to hold Option or C or anything else.
Since the OS is not installed on the new HDD the Bluetooth is not operational.

Get a USB keyboard.

Push and hold the power button for 5 seconds!

Then release the power button and push and hold the option key to get the select the os to boot from (having the DVD with OS in the drive).

Alternatively press and hold the C key to boot from the DVD.