Skip to main content
ttfmn
ttfmn
Participant
June 19, 2026
Question

upgraded apple operating system registered too many times

  • June 19, 2026
  • 1 reply
  • 0 views

I upgraded my Mac, I have a perpetual adobe acrobat 2020 license. I am getting a message that my serial number is already in use on another computer and I have reached the maximum allowed. I must deactivate another computer in x amount of days. This is the only computer that I have the software on.

    1 reply

    Amal Jaiswal
    Community Manager
    Amal JaiswalCommunity Manager
    Community Manager
    June 19, 2026

    Hi there 


    Hope you are doing well and thanks for reaching out. We are sorry for the trouble.


    When you upgraded your Mac, your system may likely got a new hardware fingerprint. Adobe's activation server sees this as a different computer, so it thinks Acrobat is installed on two machines even though it's physically the same machine.

    Try to deactivate Ddrectly from Acrobat 

    • Open Adobe Acrobat 2020

    • Go to Help > Deactivate

    • This releases one activation slot

    • Then immediately go to Help > Activate and re-enter your serial number

    This essentially resets the license on your current machine and is usually enough. For more information, please check the help page https://adobe.ly/4oEc7CV 


    Hope this information will help


    ~Amal

    Terms & ConditionsAccessibility statement
    Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices