If you follow these steps, you can be confident that you will protect your personal information and leave a positive impression on your Mac’s new owner.4.
It may seem like a complicated process to sell a MacBook or Mac, but we think it's worth the effort because of how well Macs retain their value and remain relevant much longer as compared to their PC counterparts. Once the Mac has activated, click Exit to Recovery Utilities.To set up Wi-Fi access in order to allow for activation, either connect a network cable or click on the Wi-Fi icon in the Menu bar to connect to the internet.The Mac will begin activation, which will require a stable internet connection.When the Mac starts back up, you'll be prompted to follow on-screen instructions to choose a language.The Format drop-down menu should say "APFS.".Do not delete any disks listed under the External the Disk Images sections.This will delete each additional volume. (You'll only have additional volumes if you previously added them manually using Disk Utility, so it's not common) Now, if you see more disk volumes other than Macintosh HD or Macintosh HD - Data under the Internal section of the sidebar, select them each one by one and click the minus button in the toolbar.
If you don't see Macintosh HD (or your chosen disk name if you previously renamed the Macintosh HD disk), shut down your computer, unplug all external devices except necessary ones like mouse and keyboard, and start these steps over.Locate (but don't yet click on) Macintosh HD in the sidebar underneath the Internal heading.
If you have a button called Erase Volume Group, click it.The Format drop-down menu should say "APFS" or "Mac OS Extended (Journaled)." This is based on system recommendation, so you can leave it as long as one of the two is showing up there.Make sure the Name section says "Macintosh HD.".Once you have selected the drive, click Erase in the toolbar.If you don't see Macintosh HD or your chosen disk name, shut down your computer, unplug all external devices (you can leave things like mouse and keyboard plugged in if necessary), and start these steps over.Select Macintosh HD in the sidebar underneath the Internal heading (or the name of your disk if you've changed its name from Macintosh HD).Turn on your Mac, and while the Mac is restarting, hold down the keyboard combination cmd+R until you see the Mac logo or another icon or image appear.
Here's how to reset Macs with Intel chips and reinstall mac OS if you choose to do so: