In all PC systems regardless of the make and OS used, the security is in the directory and permissions settings, and is enforced by the operating system's file-access services. When you access a Mac's drive with Target Disk Mode, you are in essence turning the whole system into a large external drive that bypasses the security offered by the operating system on it. Is there a way to password-secure, or fully disable that access to the machine? The "T" Target Hard-disk bootup allows anyone full access to all of a person's files. I've been reading through your internet security articles and am wondering whether or not there is a solution to a major Mac vulnerability. Recently CNET reader "Leonard" wrote in with such concerns about Target Disk Mode: This mode is exceptionally useful for troubleshooting, migrating accounts and data to a new computer, or even gaining quick access to a system's documents without fully booting the system however, since it gives full access to the boot drive it creates some security concerns.
At this point you can connect the system to another Mac (or even a PC) and have its hard drives mount locally on the second system for quick access. This mode can be enabled by restarting the system with the T key held down, until you see the FireWire symbol displayed on the screen. On Apple computers, Target Disk Mode is a special boot option that allows the system's hard drives to be accessed with a FireWire cable (also with a Thunderbolt connection for newer systems).
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