At the Worldwide Developers Conference (WWDC) in 2017, Apple announced that macOS High Sierra will be the last release to support 32-bit apps without compromise. Support will be dropped with the release of macOS 10.15.

Acrobat core code base was migrated to 64-bit with the Acrobat DC release in 2015. In the August 2019 release of Acrobat DC, all the shared components were also migrated to 64-bit for all the Acrobat tracks – DC, Classic 2017, and Classic 2015. Acrobat is fully compatible with 64-bit macOS.

*Following activation mechanisms will not be supported in Acrobat 2015 on macOS:

• Trials
• Upgrades
• Named User Licensing

• How can I update Acrobat to the latest available version?
  By default, Acrobat fetches updates automatically. You can also manually update Acrobat by following these instructions.
  
  
• Will Acrobat work with the currently available macOS?
  Yes, Acrobat works with the currently available macOS versions. Refer to the system requirements for details.
  
  
• What if I am still using Adobe Acrobat 11?
  As outlined in the Adobe Support Lifecycle Policy, Adobe no longer supports Adobe Acrobat XI. As a result, new product features, bug fixes, and security updates are no longer delivered for Adobe Acrobat XI. To ensure continued security and productivity for your PDFs, we recommend you upgrade to Adobe Acrobat DC subscription. You’ll get access to all the latest and greatest features, including support for the latest operating systems and devices. Learn more.