Back up your Mac Information:
If you have bought a new Mac already, then you can transfer all the information from your old Mac to the new computer or use an older TM (Time Machine) backup. In case, you have yet to buy a new computer, then you must try to back up all the data on a different device so that you will not have any issues later on.
Ensure that you are computer or laptop is connected to the internet that allows you to download the new copy of the Mac OS that is able to run on your device. This process is for the macOS High Sierra, however, for the older Mac computer may need a previous version of Mac OS X.
On your Mac computer, the software that you get is licensed to you, that means the software cannot be transferred to the new users of your computer, except the OS. To prevent the problems with the new user attempting to download the software and install it that is licensed by you, ensure to sign out of everything that is related to your personal information.
How to sign out of iTunes:
– On your Mac, open iTunes
– On the Menu bar, press Account located on the left side of your screen.
– Now, press Sing Out
How to sign out of iMessage:
– On your Mac, open Messages
– Press Messages that you find in the Menu bar placed on the left side top corner of your screen
– Press down-drop menu and select Preferences
– Choose your iMessage account
– Press Sign Out.
Reformat your hard drive:
After the data from your Mac, is secured and you have signed out from everything that is related to your personal information, then you can remove everything on it by re-formatting your computer hard drive.
Restart your Mac: If the startup disc starts running, then hold Command +R keys together, now, your Mac computer will boot into macRecover. Choose the Disk Utility and press, continue.
Erasing your startup disk:
Once the process is finished, choose QDU (Quit Disk Utility) from the drop-down list select Disk Utility to reformat your hard drive.
