Millions of iPhones, TVs and other devices could go offline Thursday — here’s why [updated]

UPDATED to add that some devices were already starting to see connection issues on the evening of Sept. 29. Old Macs, iPhones, PlayStation 3 and Nintendo 3DS gaming consoles, an unknown number of smart TVs, set-top boxes and other “smart” devices, and even some PlayStation 4s may lose some internet connectivity this week. That’s because…