Oct 15, 2019 OverDrive for Mac and OverDrive MP3 audiobooks are not compatible with the newest macOS version, 10.15 (Catalina), because Apple requires all apps in macOS Catalina or newer to be 64-bit,.
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32 bit apps can still be used. See: 32-bit app compatibility with macOS High Sierra 10.13.4 and later - Apple Support. If you want to uninstall one, it is done the same as any other app. See: How to delete apps on your Mac - Apple Support. Install and uninstall apps from the Internet or disc on Mac - Apple Support. Jul 24, 2019 It also began warning users that Mojave will be the last macOS update that will support 32-bit software. Essentially, what this means is that 32-bit software just won’t run in macOS Catalina. It won’t be slow, sluggish or result in a warning — 32-bit apps will simply not run or open whatsoever. Apple’s latest version of macOS, 10.15 Catalina, looks a lot like earlier versions of the operating system, but is vastly different under the hood.The biggest change is that Apple ripped out all the code that, in earlier versions, made it possible to run older 32-bit apps in Apple’s 64-bit operating system.
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.
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.
Opening 32-bit apps
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
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.
How to find 32-bit apps on your Mac
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System Information can find 32-bit apps that are installed on your Mac:
- Choose Apple menu > About This Mac, then click the System Report button.
- Select Legacy Software in the sidebar. All legacy software is 32-bit.
- If you don't see Legacy Software in the sidebar, select Applications in the sidebar, then check the list of apps on the right. The column labeled ”64-Bit (Intel)” shows ”No” for apps that are 32-bit.
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.
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How to contact the app developer
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:
- Select the app in the Finder.
- Choose File > Get Info from the menu bar.
- Look for copyright information in the Info window. For example, Apple is the developer of this app:
Apple Catalina 32 Bit
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In a recent blog post, my colleague Kayla Myrhow did an excellent job explaining the 32-bit application issue for users who are considering or have already moved to macOS® Catalina. In this post, I’ll show you how to set up your Mac® to continue to run 32-bit apps. You can do this either before or after you upgrade to macOS Catalina.
There are only two steps, but it does take about 45 minutes to complete this setup:
- Create a Parallels Desktop® for Mac virtual machine and install an older Mac operating systemin it.
- Install the 32-bit apps you wantinto this new virtual machine.
I made a videoof this entire process—I edited out the boring parts but left all the essentialsteps. The end result is the 5-minute video below. For this video, I chosemacOS High Sierra as the older Mac OS, but you could install Mojave, Sierra oralmost any older Mac OS. I also chose the Office for Mac 2011 suite as the32-bit application, because several users have told me that it contains the setof 32-bit apps that they most want to run in Catalina.
After you finish this setup, you will be able to run 32-bit apps on your Mac running macOS Catalina.
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Try Parallels Desktop for free for 14 days and run 32-bit apps on your Mac.
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Let us know inthe comments which 32-bit apps you need to run on macOS Catalina and how thisis working out for you.