updating
How do I update Catalina 10.15 to a more modernized version? like mojave or whatever clever and new? I can't use any actual apps that I need to use. any help would be helpful.
iMac 21.5″, macOS 10.15
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What year model is your iMac?
see > Identify your iMac model - Apple Support
To check for Updates and Upgrades.
