A: No operating system that old is fully secure. However, if you use a firewall, avoid sketchy websites, and run an up-to-date browser, you can use it safely for offline tasks or dedicated legacy software.
Certain legacy professional creative suites and plugins are only compatible with the Yosemite architecture. mac os x yosemite 10.10 5 download dmg
Ensure your Mac supports Yosemite (generally Macs from 2007–2014). A: No operating system that old is fully secure
Since Yosemite is now considered legacy software (released in 2014 and replaced by OS X El Capitan, macOS Sierra, etc.), this review focuses on its historical significance, performance on older hardware, and the safety of downloading it today. if you use a firewall