Hi, I have a 2013 iMac. It's running on Mojave currently, I want to upgrade it to the OLDEST supported OS, which I believe is Big Sur.
In Software preferences I clicked to upgrade to Catalina (which seemed sensible given past bugs of skipping past Catalina). The process completed, so I am now running on Catalina, I expected to see "Upgrade to Big Sur" in Software prefs, but it's not there. It says my machine is up to date?!
I'd be grateful for any idea how to move from Catalina to Big Sur from here, apparently without any help from Apple's Software Update facility!
Thanks
In Software preferences I clicked to upgrade to Catalina (which seemed sensible given past bugs of skipping past Catalina). The process completed, so I am now running on Catalina, I expected to see "Upgrade to Big Sur" in Software prefs, but it's not there. It says my machine is up to date?!
I'd be grateful for any idea how to move from Catalina to Big Sur from here, apparently without any help from Apple's Software Update facility!
Thanks