[mikhael28]

Cybersecurity. You are 10x more likely to be hacked than someone running a modern OS with browser+os-level zero days patched. At least run Linux on it.

[crimsontech]

Why do you think they haven’t updated the OS and browser?

Also, how can you patch a zero day?

[hnfong]

Apparently according to online sources, the latest OS supported on a 2010 iMac is macOS Mojave, and the latest security update for Mojave was released in 2021.

[jlokier]

Later versions of macOS can be installed on older hardware than is officially supported by Apple, by using OpenCore Legacy Patcher: https://dortania.github.io/OpenCore-Legacy-Patcher/