As had been expected, Apple on Monday confirmed that macOS 10.14 Mojave will be the last version of macOS to offer support for legacy 32-bit apps.
The announcement was made on Monday, during the Cupertino firm’s Worldwide Developers Conference Keynote address. When a user opens a 32-bit app in High Sierra, they will receive a warning telling them, “This app will not work with future versions of macOS”. Clicking “OK” on the prompt allows the app to open as usual.
In the initial beta of Mojave, the warning only displays the first time each app is opened. That could change in future betas, as Apple has previously said that it would include “aggressive” warnings about 32-bit apps in this version of macOS.
The process of phasing out 32-bit macOS apps appears to be following the same path Apple took when phasing out 32-bit apps on iOS. In iOS 10, Apple began warning users that their apps wouldn’t work with future versions of iOS. As of iOS 11, 32-bit app support was gone.
If you receive a warning about any of your favorite macOS apps You’ll want to contact the developer of the app to prompt them to update it to 64-bit or you’ll need to find a similar app that has received a 64-bit update.
If you’d like to find out which of your apps is still 32-bit without waiting for the warning, follow along with our easy how to that demonstrates how to display all of the 32-bit apps that are installed on your system.
(Via MacRumors)