2017 at WWDC Apple introduced new models of iMac and MacBook, and again the time has come when you should decide whether you want to sell your old Mac and buy a new one. If you still decide to sell the computer, don’t forget to prepare it.
1. Make a backup copy of the
If you already have a new Mac, you can easily transfer all the data from the old using Time Machine. If you plan on buying another Mac soon after the sale, make sure you have backed up all personal data.
2. Sign out of all accounts
So that the buyer did not have any difficulties using the software on your Mac, log out of your account in all Apple services.
How to sign out iTunes
How to get out of iMessage
How to get out of iCloud
3. Format the hard drive
Make sure that all important data is synced, then you can format the hard disk to remove all information.
4. Reinstall macOS
After formatting the disk don’t turn off your Mac, and immediately perform a clean installation of macOS. If you turned off the computer, restart it, holding down Command+R.
It should be borne in mind that to reinstall your operating system, you must be connected to the Internet.