Hi James,

I once had a laptop which sometimes I couldn't shut down! So I looked through the manual....

The manual recommended in this situation to remove the battery. It's usually pretty easy to remove the battery in most laptops. Removing the battery did the trick! :)

After the battery was removed, you could reconnect the battery and the computer would remain off.

My laptop wasn't a Mac (I think it was a Compaq), but it might work in a Mac too. (I'm not familiar with Macs.)

- Dien Rice