Windows 7 very slow in Parallels Desktop 11 on Mac running El Capitan

Discussion in 'Installation and Configuration of Parallels Desktop' started by RobertA4, Mar 21, 2016.

  1. RobertA4

    RobertA4 Bit poster

    Messages:
    2
    Screen Shot 2016-03-21 at 9.34.06 AM.png hello,

    i have upgraded a mac to EL Capitan (reformat HDD and reinstall Mac OS Fresh).
    i have a Windows 7 VM and it works fine on Yosemite but not on El Capitan.
    VM is configured as follows: (that worked flawlessly on yosemite)
    Optimization = faster virtual machine
    CPU = 2
    RAM = 4GB
    Graphics = 512MB

    Host machine model is iMac14,1 (2.7GHz Intel Core i5, 8GB RAM)
    please see screenshot for the prl_vm_app cpu usage...

    running Parallels Desktop 11.1.2
     
    RobertA4, Mar 21, 2016
    #1
  2. PaulChristopher@Parallels

    PaulChristopher@Parallels Product Expert Staff Member

    Messages:
    3,112
    Hello Robert,
    The reason why numbers are different is that Mac and Windows calculate CPU consumption in 2 different ways:
    In Windows: No matter how many CPUs you have, if you have (for example) 6 CPUs installed, the total consumption of all 6 CPU resources will equal 100%.
    In Mac: Multiply the number of CPUs you have by 100%. For example, if you have 6 CPUs installed, the total consumption on Mac will equal 600%. Please refer to this article. Thanks!
     
    PaulChristopher@Parallels, Mar 22, 2016
    #2

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