upgrade to os 10.12
how can i upgrade from os 10.11.6 to 10.12 on my iMac 2009
how can i upgrade from os 10.11.6 to 10.12 on my iMac 2009
Only iMacs from late 2009 can upgrade to macOS Sierra
Click on this link, How to upgrade to macOS Sierra - Apple Support
if your iMac can upgrade to Sierra it can upgrade to macOS High Sierra,
Only iMacs from late 2009 can upgrade to macOS Sierra
Click on this link, How to upgrade to macOS Sierra - Apple Support
if your iMac can upgrade to Sierra it can upgrade to macOS High Sierra,
upgrade to os 10.12