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Target disc mode not working

My target disc (Macbook Pro) shows the firewire icon but nothing shows up on the host (PowerMac). I've tried several different ways and enabled it to show up in preferences. I don't have any other firewire device plugged in. I'm using a brand new cable. Thanks

MacBook Pro, Mac OS X (10.6.8)

Posted on May 22, 2012 2:13 PM

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6 replies

May 22, 2012 3:10 PM in response to cherylfromvenice

Never tried it while my PowerBook and my MacBook were still in use, but I would hope that the older OS would understand the newer MacOS X Extended Journaled + GUID format of the MBP's drive. Besides looking all over the desktop (and making sure that external drives are set to be visible in the Finder preferences, as in Lion), have you tried running Disk Utility?


The MBP's drive, in target mode, should appear in DU's list of devices and volumes.

May 22, 2012 5:05 PM in response to tjk

Closed everything and it's not there. Also looked in the disc utility. The cord was a very inexpensive one I got on Amazon. Could that be it? Also, there is only about 4MB of storage left on the host hard drive, though that shouldn't keep the target drive from showing up. I'm running 10.4.11 on the host and Snow Leopard on the target. The target is so full it won't show me anything but Safari, not even the finder, but it is going into target mode every time no problem.

May 22, 2012 6:44 PM in response to cherylfromvenice

cherylfromvenice wrote:


The cord was a very inexpensive one I got on Amazon. Could that be it?


It's certainly possible. Anything else you could try it on?



Also, there is only about 4MB of storage left on the host hard drive, though that shouldn't keep the target drive from showing up.


4MB??? I've never seen a situation like this, but I suspect it could indeed prevent the Target from showing up. The Host needs some overhead to make things work.



I'm running 10.4.11 on the host and Snow Leopard on the target.


I was going to suggest running Software Update on the Host, but with only 4MB of space, it couldn't install anything anyway.



The target is so full it won't show me anything but Safari, not even the finder, but it is going into target mode every time no problem.


Well, that kills my other idea. I was going to suggest switching Host and Target around.


At this point, I'd suggest getting some external storage so you can offload at least 10-15GBs (ideally, you never want to go under 15% free space available). Then try again.

Target disc mode not working

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