Apple II lived 5966 days, not including the IIe card for LC, which extends the lifespan to 6543 days. Carbon lived until July 24, 2012. Including it as an "LTS

Apple II lived 5966 days, not including the IIe card for LC, which extends the lifespan to 6543 days. Carbon lived until July 24, 2012. Including it as an "LTS" facility, Classic Mac OS lived 10,395 days. By comparison Win NT (if you include Windows 10 as I do) is 9083 days old and counting.