In System Report’s Software section, click Applications and then click on the column name-64-bit (Intel)-to sort the applications. To identify your 32-bit apps, choose About This Mac in the Apple menu and then click the System Report button. Until then, here’s what I suggest: Step 1: Identify your 32-bit Apps You’ve got at least a year to determine how you’ll handle apps that don’t run under the next iteration of macOS (after Mojave). The bad news is that they will cease to work next year under macOS 10.15. And, in my (albeit limited) testing, most if not all of the 32-bit apps that worked properly under High Sierra (macOS 10.13) continued to work under macOS Mojave (macOS 10.14). Here’s the good news: I’ve been running beta releases of Mojave all summer as I wrote macOS Mojave For Dummies. You’ll still see an alert like this one the first time you launch a 32-bit app…

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. All 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.

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