![]() ![]() ![]() You may have seen this alert in High Sierra (I saw it regularly) and wondered what will happen when you upgrade to macOS Mojave. This is done via a one-time alert that appears when you launch a 32-bit app. ![]() While developers optimize their apps for 64-bit compatibility, Apple is notifying customers when they are using an app based on 32-bit technology. At our Worldwide Developers Conference in 2017, Apple informed developers that macOS High Sierra would be the last version of macOS to run 32-bit apps without compromise. 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.Īpple began the transition to 64-bit hardware and software technology for Mac over a decade ago, and is working with developers to transition their apps to 64-bit. The technologies that define today’s Mac experience-such as Metal graphics acceleration-work only with 64-bit apps. I’ve got advice for you on handling the upcoming transition from 32-to-64-bit apps… But first, if you don’t already know what a “32-bit app” is, or why it might matter, here’s a brief excerpt from a relevant Apple tech note*:Īll modern Macs include powerful 64-bit processors, and macOS runs advanced 64-bit apps, which can access dramatically more memory and enable faster system performance. There has been some confusion about the status of 32-bit apps in macOS 10.14 Mojave, which will be available soon (for free). ![]()
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