how to activate with existing key

[pandiyarasan]

i have the key for Acrobat Professional XI, due to my mac OS update the previous version not working so i have removed and installed the Acrobat DC version but it showing for 7 days and how to do activities with the existing key itself.

[ProDesignTools]

In most cases, here's a guide to all you'd need to know:

How to Move Adobe Software Between Computers or System Upgrades

However, if it is macOS Catalina that you're referring to, then Apple dropped all support for older 32-bit apps so Acrobat XI would be unsupported... Please see this discussion:

https://community.adobe.com/t5/Acrobat/Adobe-Acrobat-Pro-compatibility-with-MacOS-Catalina-version-1...

Hope that helps.

[pandiyarasan]

thank you so much it helps.