I am posting this for information.
The Leopard installation will check whether the iMac meets minimum requirements. However it has a bug. When it decides to refuse the install it either proposes a "restart" or an "ok" button. Pressing either button just re-boots the iMac and DOES NOT EJECT the Leopard install CD. Hence initiating a endless loop.
To eject the disk I found this solution.
1. Force switch of the iMac - pull the plug if you have to.
2. Swith the iMac on and BEFORE the bong sound press CMD ALT O F keys (yes all four at the same time).
3. Keep them pressed until some console like text appears on the screen
4. Enter "EJECT CD" and return. The CD should come out.
5. Enter "MAC-BOOT" and return. The iMac reboots.
The Leopard installation will check whether the iMac meets minimum requirements. However it has a bug. When it decides to refuse the install it either proposes a "restart" or an "ok" button. Pressing either button just re-boots the iMac and DOES NOT EJECT the Leopard install CD. Hence initiating a endless loop.
To eject the disk I found this solution.
1. Force switch of the iMac - pull the plug if you have to.
2. Swith the iMac on and BEFORE the bong sound press CMD ALT O F keys (yes all four at the same time).
3. Keep them pressed until some console like text appears on the screen
4. Enter "EJECT CD" and return. The CD should come out.
5. Enter "MAC-BOOT" and return. The iMac reboots.