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With the release of macOS 10.13.4, Apple has begun warning Mac owners when they run 32-bit applications, a step toward the eventual banishment of such software.
Among the most visible enterprise programs spawning such warnings? The no-longer-supported Office for Mac 2011.
"To ensure that the apps you purchase are as advanced as the Mac you run them on, all future Mac software will eventually be required to be 64-bit," Apple wrote in a support document published last week. The warnings were the first messaging about future 64-bit exclusivity aimed at end users.