In news that won’t surprise attentive TidBITS readers, Apple has announced that the upcoming macOS 10.14 Mojave will be the last to support 32-bit apps. If you rely on older 32-bit apps, you probably have at least 15 months before it becomes a problem in macOS 10.15.
Last year at WWDC, Apple said that High Sierra would be the last version of macOS to run 32-bit apps “without compromise.” The recently released macOS 10.13.4 takes the next step in that direction by alerting users the first time they launch a 32-bit app. Here’s what we know.