Re-installing Catalina
Hi I am erasing my oldest daughters MacBook Air and giving it to my youngest. So I am re-installing MacOS Catalina. Do I install it on Mac HD or Mac HD- Data?
MacBook
What to do before you sell, give away, or trade in your Mac - Apple Support explains the proper steps.
babowa provides additional advice in: Do I reinstall the OS on Macintosh HD dat… - Apple Community