How to find out if your Mac’s software is 32- or 64-bit


One of the major announcements (among many) at Apple’s 2018 WWDC was that macOS 10.14 Mojave, the current version of the Mac operating system, is the last version that supports 32-bit software. With macOS 10.15, only 64-bit software will be supported.

The clock is ticking. We’ll probably see macOS 10.15 this fall, after it’s previewed at WWDC this June. If you decide to upgrade to the new macOS, you need to do a bit more than usual to prepare your Mac—you need to make sure your apps are 64-bit versions. If your app is a 32-bit version, it will not work.

Apple

Apple actually started to warn people about the change with macOS 10.13 High Sierra. If you launch a 32-bit app in High Sierra, an alert pops up to tell you that your app needs to be updated. The alert appears only once in High Sierra, and in Mojave, it appears every 30 days.

If you can’t recall whether an app needs to be upgraded or not, there are a couple of ways to find out besides the launch alert. Here’s how.

Find 32-bit apps on your Mac through System Report

1. In the Finder, click on the Apple menu and select About This Mac.

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2. In the Overview section, click on the System Report button.



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