If your Performa has the Shut Down desk accessory under the Apple Menu, you can use Command-key equivalents to perform a shut down. If you are using System 7.5, you can also use this procedure because System 7.5 provides the Shut Down desk accessory in the Apple menu.
Follow these steps:
1. Type Command-F, the Find command brings up the Find window.
2. Type "Shut Down" into the Find Window, and press the enter or return key.
3. When the "Apple Menu Items" window appears, Type Command-O (letter O), the Open command launches the Shut Down desk accessory and shuts down your computer.