can i update garageband on a 2010 mac with sierra os
i have an old mac my kids used to use. i am hoping i can use it for music recording with garageband. It has sierra 10.12.6. when i try to update garageband from app store it says i need 10.13.6 OS. How do i update the OS? I cant find my mac listed when i go to update - maybe its too old?
iMac 21.5″, macOS 10.12