I know this is a totally newbie question and I have never done this before so I was wondering if anyone could tell me the steps I would need to take if I was going to sell my iMac but wanted to back everything up onto an external hard drive how that would be done AND how would I be sure that everything was on said backup and nothing at all remaining on the computer anywhere? Any help would be greatly appreciated!
Before you sell or give away your computer, in addition to the steps listed in this support article, take these steps:
1. Run Apple Diagnostics or the Apple Hardware Test. The buyer will do this (or he should), and you don't want to be surprised by the results.
2. Reset the PRAM and the SMC, which might contain personal information.
3. If you set a firmware password, remove it by running Firmware Password Utility in Recovery mode.
4. If you activated FileVault in OS X 10.7 or later, turn it off.
5. If you use Boot Camp, the partition must be deleted.
6. If you created any other data partitions on the internal drive, remove them in Disk Utility.
7. If the machine has an internal hard drive, erase the one remaining data partition with the option to zero out data. An SSD doesn't need to be zeroed.
You can't legally or practically transfer any software downloaded from the Mac App Store to the new owner of the machine, even if it was free. That includes OS X, so if you upgraded to OS X 10.7 or later, you must reinstall an older OS, either from the installation media, if applicable, or by starting up in Internet Recovery mode (option-command-R at the startup chime.) If you installed from physical media, deliver those to the new owner.
Replacements for the original media can be ordered from Apple.
If the machine shipped with OS X 10.4 or 10.5, then you may be able to install on it from a retail Snow Leopard disc (which you must then transfer to the buyer.) To run Snow Leopard, the machine needs at least 1 GB of memory. The buyer should understand that if he doesn't get the original media from you, he won't get the bundled iLife applications or the Apple Hardware Test.
The new owner will have to redownload any software that came from the App Store, if applicable, including OS X upgrades, under his or her Apple ID. If you ever updated the bundled iLife applications (Garage Band, iMovie, and iPhoto) through the App Store, you can't transfer those either. The buyer will have to purchase them.
Remove the machine from your list of registered products. If it's still covered by an AppleCare Protection Plan, transfer the coverage to the new owner by following the instructions in the AppleCare Terms and Conditions (under the heading "Transfer of Plan.")
Click here and follow the instructions. If the computer originally shipped with Mac OS X 10.6.8 or earlier, when you reach step 5, insert its original disk, restart with the C or Option key held down, use the Disk Utility to erase the internal drive, and install a fresh OS.
To make the backup, use Time Machine or create a bootable clone with a product such as the Disk Utility, Carbon Copy Cloner, or SuperDuper.
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Thank you SO much for the quick responses and the other tips you two provided for me, I really appreciate it, Im totally new to this kind of stuff and need all the help I can get when it comes to this type of stuff. 😟 I may be back here to ask another question or three so keep a lookout for any other questions that might arise from me. Thanks again!
Backing up everything on an iMac to an external hard drive
