software update
from version 10.12.6 to latest version 10.13.0 or higher
iMac 21.5", macOS 10.12
Apple Event: May 7th at 7 am PT
from version 10.12.6 to latest version 10.13.0 or higher
iMac 21.5", macOS 10.12
How to upgrade macOS to macOS 10.13 High Sierra
https://support.apple.com/en-us/HT208969
Ho to upgrade macOS to macOS 10.14 Mojave
https://support.apple.com/en-us/HT210190
How to upgrade to macOS Catalina
How to upgrade macOS to macOS 10.13 High Sierra
https://support.apple.com/en-us/HT208969
Ho to upgrade macOS to macOS 10.14 Mojave
https://support.apple.com/en-us/HT210190
How to upgrade to macOS Catalina
software update