Do Not Buy Parallels 16 for Big Sur Testing

Discussion in 'Installation and Configuration' started by stuartf, Aug 14, 2020.

  1. stuartf

    stuartf Bit Poster

    Messages:
    25
    Big Sur VMs is unusable on Catalina host due to 3Mb graphics card limitation

    Official statement from technical support:

    Thank you for contacting Parallels Support.
    This email is in regards to your graphic card usage in Big Sur Virtual machine.
    In order to use maximum resources in Big Sur Virtual machine, Host OS should also be Big Sur due to the recent API implementation.
    We are closing this ticket. Please get back to us if you have any other queries.
    Thank you for choosing Parallels. Have a great day!
     
  2. stuartf

    stuartf Bit Poster

    Messages:
    25
    On a Catalina host machine. Parallels will only allocate a maximum of 3Mb for use by emulated graphics on Big Sur (the underlying card is irrelevant). Normally 256Mb is be allocated by default.

    This makes the VM unusable. Apparently this limit does not apply if running om a Big Sur host. I am unable to test this as I only have a single Parallels license running on Catalina
     

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  3. stuartf

    stuartf Bit Poster

    Messages:
    25
    That KB article has zero relevance to the issue I am raising which concerns Big Sur virtualisation on Catalina with Parallels 16.
     
  4. stuartf

    stuartf Bit Poster

    Messages:
    25
    To clarify further if you are purchasing or upgrading to Parallels 16 while still running Catalina on your base machine, with the hope of testing the Big Sur beta. That will result in an almost unusable virtual machine due to this issue

    This common use-case of beta testing the next version of macOS while still on the current production version of macOS is something that has previously been possible and a feature of the annual upgrade

    The product documentation for Parallels 16 fails to mention this limitation.
     
  5. Maria@Parallels

    Maria@Parallels Kilo Poster

    Messages:
    8,693
    Hi, please sorry for the inconvenience.
    Just replied you here.
    Please let us know if you have any additional questions.
     

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