The move to pure 64-bit apps for MacOS has been in the making for years, and Apple is helping developers transition their 32-bit apps to 64-bits. In the course of the conversion Apple demanded last year that all apps in the App Store must be 64-bit.
If you regularly update your apps or only use apps from the App Store, this is fine. But if you stick to an old favorite that the developer does not want to update-like Microsoft Office 11 for the Mac-you might want to look for a replacement.
You can skip the Catalina update and continue to use the old software. However, we recommend updating your operating system so that you are always aware of Apple's security patches. Keep in mind that developers still have some time to upgrade their 32-bit apps to 64-bits, so you may not lose them all.
This allows you to check which of your apps are not suitable for Catalina.
Some of the apps that do not work with the Catalina update
- Apple Tools : iWork®, Aperture, Apple DVD Player
- Adobe CS5 apps : Photoshop , InDesign, Illustrator, Lightroom, Acrobat, and Premier Pro, Application Manager.
- Microsoft Office 2011 Apps : Outlook, Word, Excel, PowerPoint.
- BBEdit Tools : TextWrangler
How to Check for 32-Bit Apps on Your System
1. Click the Apple icon in the upper left corner of your screen.
2. Select About This Mac .
3. Click System Report .
4. Scroll to the Software section and click Applications .
5. Right you can see a list of apps and a column labeled 64-bit (Intel) . If one of these apps in this column contains a No it means that they are not 64-bit apps. You must update it or find a replacement before you receive the MacOS Catalina update.
Need more information about the MacOS Catalina Update? Here'sthis fall.
Originally released earlier this week. The update contains more information about the apps being removed.