2577 Views 1 Reply Latest reply: Dec 8, 2009 11:57 PM by Kenichi Watanabe
You iMac is probably a recent Intel iMac. This forum category is for the old CRT-based iMac G3. So going forward, you should post your question here to get the appropriate audience.
But to answer your question, you can try starting up with the Option key held down. If it is currently stuck, you can force a shutdown by pressing and holding the power button.
The Option key startup should give you Startup Manager. It will show a screen listing your startup options. Select the internal drive and continue startup. When you get to the Desktop, open System Preferences Startup pane. Make sure the internal drive is selected (highlighted) as your startup disk. Then try restarting normally.