Originally Posted by JiveTurkey
It may harm the memory card if you have one installed, but only if the Mac is somehow interacting with it. I would suggest you eject the card in Finder before pulling the cord, just to be safe.
Incidentally, with the random device removal error, I was able to keep this from happening by going into Energy Saver preferences and unchecking the "put disks to sleep when possible" option.
do you know anything about what to do if the cord becomes unplugged and damages the memory card? this happened to me yesterday and ive been crying ever since because i hadn't even seen all the pictures i was trying to upload. i plugged my camera in to my macbook and walked away, when i came back it somehow unplugged a little bit, the error code came up, and now its just symbols as files on my memory card. i'm so upset. is there anything you can think of to get my pictures back?