How to update Mid 2011 iMac past 10.13.6?
My macOS High Sierra (imac (27-inch, Mid 2011, version 10.13.6) has not been udated and I am unable to update to another software update. How do I catch up? updated since. My macOS for imac has not been updated to a newer version.
[Re-Titled by Moderator]
iMac 27″, macOS 10.13