Now Ive encountered a new problem, everytime I turn on my mac, it shows the Apple logo and the Safe Boot progress bar.
Not even reaching halfway through the bar, it just shuts down itself, every single time.. please help?
It's attempting to fix a problem with the file structure of the drive and failing.
can use wireless to do the keyboard pressing thing when it starts up?
I've also tried inserting my original OS installation disc and press C..it just shows a grey screen, then the disc got ejected,
Disk is dirty or scratched, or defective.
Use a tiny bit of rubbing alchol on the bottom and polish to a shine and try again, with the wired keyboard using c or option key held down.
If the machine has a firmware password, you will have to use option key and use the firmware reset utility to disable it before you can boot off the disk to perform repairs, erases or install OS X.
Please help, I just need to go into my system one more time and backup my important datas before i go for the 1TB Seagate Replacement Program.
You can install OS X on a external drive and boot from that to attempt recovery.
more asistance here
You won't be able to do a Time Machine or clone of your drive, since it's failing. You may be able to move important files and folders from your user accross to an external drive. Until you do a backup, you must stop using that computer. The more you use it, the more it will fail, ending in complete failure and you won't be able to do any backups.
A port powered drive won't have sufficient power to reliably power up that external.
I wouldn't recommend getting such a large drive. A 3TB drive will be far more prone to failure than a smaller one, say 1TB.