The download took three hours. The file was a behemoth, a digital leviathan weighing nearly 13 gigabytes. As the progress bar inched past 90%, the iMac's fan roared like an asthmatic lion. At 100%, the DMG file appeared on her desktop: a pristine white drive icon named Install macOS Ventura .

The first thing she noticed was the silence. The fan, which had roared for years under Catalina’s weight, was now a quiet whisper. The second thing: her old Wacom tablet, which Catalina had killed two updates ago, suddenly lit up.

The old iMac sat on Elena’s desk like a gravestone. Its screen, a ghostly gray, displayed the spinning wheel of death for the fourth time that week. Catalina, once a proud operating system, had become a sluggish, bug-ridden swamp.