Hi Ralph, depending on your Acrobat version, you may be able to install it manually. This post has the steps to add it to Firefox, but your Step #1 is going to look different because the file system is different on Mac: https://support.mozilla.org/questions/1332623 This article ''might'' help, it lists several different paths Adobe uses to store Acrobat files: https://www.adobe.com/devnet-docs/acrobatetk/tools/AdminGuide_Mac/macintosh_deployment.html In reading threads, I glazed over a bit on the difference between the system library and the user library...