MacOS High Sierra 10.13.4 Now Shows an Alert the First Time You Launch a 32-Bit App


Starting with macOS High Sierra 10.13.4, apps that have not been updated to use 64-bit processes produce a one-time alert when opened. This gives users advance notice that they are running 32-bit software, which will not be compatible with macOS in the future.

It’s almost certain we’ll hear more about this at WWDC when MacOS 10.14 is announced. I think 32-bit apps might still work in 10.14, though.

Here’s how to check for 32-bit apps on your Mac:

From the Apple menu, choose About This Mac, then click the System Report button. From the system report, scroll down to Software, then select Applications. When you select an individual application, you will see a field titled ”64-bit (Intel)”. “Yes” indicates 64-bit; “No” indicates 32-bit.

Friday, 13 April 2018