How do I install macOS 10.15 or newer on a 2011 iMac?
How do I install macOS 10.15.0 version or newer on a 2011 iMac that currently has 10.13.6? I recently had a new hard drive installed and lost my Windows applications. I purchased 2021 Windows Home and Student but I can't install it. It says I need a newer version of macOS.
[Re-Titled by Moderator]
iMac 21.5″, macOS 10.13