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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.
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:
Hope that helps.
thank you so much it helps.