Here’s a simple 3-step way of replacing a HD in a Mac :
[ in this example a new HD is put into a Mac mini (version mid 2007) ]
1- clone the internal HD directly onto the new HD
These instructions assume you have another Intel-Mac and a USB-enclosure for a SATA-harddisk (that you will afterwards use to turn the old internal HD into an external one) available :
– put the new harddrive into the USB-enclosure
– connect the USB-cable to your other Intel-Mac
– connect the Mac mini to the Intel-Mac using a FireWire-cable
– (temporarily, just during startup) connect a USB-keyboard to your Mac mini
– startup the Mac mini while pressing the T-key on the keyboard (“Target Mode”)
– both the Mac mini and the USB-connected new HD will now show up in your Finder (on the Intel-Mac)
– open Disk Utility
– click on the Erase-tab
– select the USB-connected HD list on the left, and erase it in MacOS Extended (Journaled) format
[ BEWARE : do NOT format your HD in MacOS Extended (“Case-sensitive” Journaled) mode ! As that will prevent some applications to run ! e.g. Adobe Photoshop 10 Editor ]
– click on the Restore-tab
– from the list on the left drag the partition of your Mac mini onto the “Source”-field
– then drag the new partition from your new HD onto the “Destination”-field
– click the Restore-button, and wait
2- replace the HD
– open the instructions on how to replace the HD from the iFixit-website (or print them out) and read them
http://www.ifixit.com/Guide/Installing-Mac-mini-Model-A1176-Hard-Drive/1108/1
– get the new HD out of the USB-enclosure
– now gently open the Mac mini enclosure
– blow the dust of the interior using a compressed air blower [ do NOT use a hair dryer ! ] or using a vacuum cleaner with a piece of thin cloth (e.g. a napkin) tightly fit to the suction tube (to prevent anything from actually being sucked in)
– replace the HD (make sure the connectors are clean and fit thight)
– while you’re at it, you might also check the AirPort-card connector
– and finish up (all using the iFixit-instructions)
3- test the new HD
– restart
Note : if you would like an alternative procedure for replacing a hard drive in a Mac, look here :
https://macmanusnl.wordpress.com/2012/06/12/installing-a-new-hard-drive-2/
