Catalina marked the end of 32-bit apps for macOS, something Apple had provided over a decade of transition help with and two years of warnings about for consumers. Nonetheless, people with older apps they hadn’t launched in a long while were still taken by surprise, judging by email from readers and forum posts.
MacOS Catalina also shows a stop symbol over the icon of 32-bit apps in the Finder, so you know that the app isn't going to open. Aperture With the release of macOS Catalina, Aperture is going to. The new version of macOS marks the end of old 32-bit apps whose software code was never refreshed to support 64-bit CPUs. In June 2018, Apple confirmed the end of 32-bit apps, noting that 10.14 Mojave would be the last operating system to allow them to run (see “macOS 10.14 Mojave Will Be the Last to Support 32-Bit Apps,” 12 June 2018.
MacOS Catalina is here, and with the update comes the transition from 32-bit apps to 64-bit apps. Overall, this is a good thing because it means that apps will run faster and access more memory.The newly released version of macOS 10.15 Catalina has stopped supporting 32-bit apps completely. Update 02/2021 - Many of you guys have been mentioning that the download link does not work for the VMDK file. It looks like the site that originally hosted.
Macworld offers a guide on how to find outdated apps to figure out what to get (if anything) to replace them, both before you update to Catalina and afterwards.
However, if you no longer need an app that can’t launch in Catalina, you’re not obliged to get rid of it. Apps, launch agents, daemons, helpers, and other components no longer work, but they won’t do harm. And it might be a mistake to delete apps that only have modules that aren’t yet 64-bit compatible.
As we note in the guide, you can use the free donationware app Go64 to identify outdated programs. It will also let you select and delete apps that can be thrown in the trash without a problem. The Trash icon is grayed out for apps that are nested deeply within other folders or only have some 32-bit code.
For instance, GraphicConverter 10, which is perfectly usable, contains one image-conversion route (PCDtoRAW) that isn’t compiled as 64-bit code. There’s no reason to throw it out! (Version 11 of GraphicConverter has updated or removed this lingering fragment of old code.)
If you need the storage space or prefer the cleanliness of only retaining apps that work, delete your 32-bit apps. But don’t feel compelled to.
This Mac 911 article is in response to a question submitted by Macworld reader Robert.
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