Quote:
Originally Posted by pwalker8
... Apple didn't drop support for Yosemite (released in 2014) until this year, so odds are they will continue to support Mojave for another 5 years.
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Where are you getting this data?
As much as I'd like to think High Sierra has 4 more years ahead of it, as far as security updates go, Apple seems to drop support after roughly 3 years. The last security update Yosemite received was Sept 2017. The last security update El Capitan received was July 2018.
The most recent macOS security update, released 9/26/19, included only Sierra, High Sierra and Mojave.
At this rate, Mojave only has 2 more years, and High Sierra will stop receiving security updates next fall.
But I'd like to be wrong about this since I'm clinging to High Sierra.
from
Apple Security Updates