![](/images/new-backgrounds/1265417/26541799x1.webp)
Locking an expansion bay module
You can purchase a security cable and lock to protect your Macintosh PowerBook. With a lock, you can do the following:
msecure your computer to a desk or table
mlock the expansion bay module in your computer
mlock the battery in your computer
See your
Security slot
Expansion bay module
Sample locking device with security cable
Battery
Note: You can protect the contents of your hard disk by turning on password protection in the Password Security control panel. For information on using the Password Security control panel, see the question “How do I turn password security on and off?” in the “Setting Options” topic area of Macintosh Guide, available in the Guide (h) menu.