I went to a used book store this morning and got a book on iMacs, specifically those running Panther. It talked about how to go back and forth between OS 9 and OS X, and I thought it would be fun to try. I got one of the iMacs, went to System Preferences, then clicked on OS 9 and restarted. I poked around on OS 9 for a while, then wanted to go back to OS X. The book said to go to the startup disk and select OS X. I went to the startup disk, but the only options were OS 9 and network disk. I tried network disk, but now all I get is a gray screen with a white box with a globe in the middle. How do I get out of this? I’ve tried rebooting several times with no luck. And if I ever get brave enough to try OS 9 on this machine again, how would I get back to OS 10? Help please! Edited to add: After being unplugged for about 5 minutes, it went back to OS 9. How do I get back to OS X, please? I found it hidden under OS 9, and it keeps telling me some items are not in a folder and if I try to go back to OS X that the computer may not be able to restart.