Mac OS 8/9 - Rebuild the Desktop: What is it? Rebuilding the desktop is much like Defrag on the PC. Over time the files need to be put back in thier places. When should I? When a program(s) will stop working, or not functioning properly. OR after there have been many installes and uninstalls of various programs, or after use over a period of time.
Why should I? Because this is a quick fix for a very common problem. In most cases after the desktop is rebuilt The programs start working again. Rebuilding the desktop is very simple.
Step One: Have the user reboot the computer. Step Two: Right after the computer starts powering back up have the user press and hold the Apple (command) Key + Option Key.
Have them hold this while the computer is booting up. Just before it completes a box will appear asking the user if they want to rebuild the desktop. Step Three: Click Yes
It is recommended that Macintosh users to rebuild the desktop at least once a month.