Apple began transitioning to 64-bit hardware and software technology for Mac over a decade ago, and all modern Macs now include powerful 64-bit processors that can run advanced 64-bit apps. These apps can access dramatically more memory, enable faster system performance, and take advantage of technologies that define today's Mac experience, such as Metal graphics acceleration.
Apple has been working with developers to transition their apps, and in 2018 Apple informed them that macOS Mojave would be the last version of macOS to run 32-bit apps.
Nov 15, 2019 32-bit app compatibility with macOS High Sierra 10.13.4 and later. Or that the app is not optimized for your Mac and needs to be updated. MacOS Catalina. MacOS Mojave and macOS High Sierra. If you haven't upgraded to macOS Catalina, you can still open and use the app, but you should check with the app developer for a 64-bit version that. Sep 21, 2016 For the first time, the Mac operating system comes with cleaning tools. The new Optimized Storage feature in macOS Sierra might not sound like.
Apple's transition to 64-bit technology is now complete. Starting with macOS Catalina, 32-bit apps are no longer compatible with macOS. If you have a 32-bit app, please check with the app developer for a 64-bit version.
When you attempt to open a 32-bit app, you will see an alert that the app needs to be updated to work with this version of macOS, or that the app is not optimized for your Mac and needs to be updated.
macOS Catalina
macOS Mojave and macOS High Sierra
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If you haven't upgraded to macOS Catalina, you can still open and use the app, but you should check with the app developer for a 64-bit version that also works with the latest macOS.
System Information can find 32-bit apps that are installed on your Mac:
When upgrading to macOS Catalina, the installer shows a list of recently used apps that are 32-bit. You can review this list before choosing whether to cancel or continue the installation:
macOS Catalina also shows a prohibitory symbol over the icon of each 32-bit app in the Finder, letting you know that the app will not open.
The developer (or vendor) is the person or company that made the app. The easiest way to find contact information for an app's developer is to search the web for their name or the name of their app. Learn more about contacting third-party vendors.
To find the name of the developer:
Tomorrow at midnight PT, Apple will begin sending an alert message when you open a 32-bit app in MacOS 10.13.4, saying 'App Is Not Optimized for Your Mac': This app needs to be updated by developer to improve compatibility. It's a one-time (per app) alert, designed to help MacOS make the full transition to 64-bit. On Apple's Developer site has posted an official reminder that starting January 1st, 2018 32-bit Mac apps will no longer be accepted.
While developers optimize their apps for 64-bit compatibility, Apple is notifying customers when they are using an app based on 32-bit technology. This is done via a one-time 'App is not optimized for your Mac' alert that appears when you launch a 32-bit app. Below you will find more information about the alert and what the 64-bit transition means for you.
This Complete Article Shows What Is App is not optimized for your Mac Alert and What To Do with It via @MiniCreo_Apps Click To Tweet'App is not optimized for your Mac' Alert
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By purging outdated 32-bit apps from macOS, Apple hopes that this alert will help users and developers to raise a concern about the modern design of Mac apps. According to Apple: '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.'
It's similar to the transition on the cleanup 32-bit apps with iOS 11. Of course, making the shift is a bit messier on the desktop. For one thing, macOS has been around a lot longer than iOS. Best mac app for recording sound. For another, while Apple does have a MacOS App Store, plenty of desktop apps are still downloaded from other channels.
You can skip this 'App is not optimized for your Mac' alert by clicking the System Report button. For those 32-bit apps that haven't updated yet, Apple recommends bugging the developers directly.
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