Upgrade to Catalina
URGENT...URGENT...V.URGENT...
My machine is at High Sierra (10.13.6), needed to update Opera and TEAMS, couldn't. They needed 10.15+. Attempted to download, got this message
"We could not complete your purchase. This version of macOS 10.15.6 cannot be installed on this computer."
Please help.
URGENT...URGENT...V.URGENT...
MacBook