10.13 (High Sierra) guest on 10.12 (Sierra) host unusably slow

Discussion in 'macOS Virtual Machine' started by johnrellis, Oct 6, 2017.

  1. johnrellis

    johnrellis Junior Member

    Messages:
    19
    A MacOS 10.13 (High Sierra) guest running on a 10.12 (Sierra) host is unusably slow on my system. Keystrokes to terminal take a couple of seconds to echo, and a Tab to complete a filename can take 5-10 seconds. Loading a small Xcode 9 project can take a minute. When High Sierra first boots, it can take a minute after the login password box appears before it echos keyboard input.

    A large Windows 10 guest works just fine. So far, the upgrade to Parallels 13 has been a complete waste of money -- I did it to create High Sierra VMs.

    Parallels Desktop 13.1.0
    Host: MacOS 10.12.6, MacBook Pro Retina 15-in Mid-2015, 16 GB, SSD
    Guest: MacOS 10.13, 4 processors, 4 GB
     
  2. DanP1

    DanP1 Bit poster

    Messages:
    4
    I have the same problem, and have been working with Parallels 2nd-level support on this. No solution yet.
     
  3. johnrellis

    johnrellis Junior Member

    Messages:
    19
    Thanks for the update -- let us know if you make any progress.
     
  4. CharlesB6

    CharlesB6 Bit poster

    Messages:
    1
    My Win 10 and my Sierra and Sierra HS are slow to the point of I am going to VMWARE and that is pretty bad.
     
  5. >>> Message has been deleted by the user <<<
     
  6. DavidW28

    DavidW28 Junior Member

    Messages:
    15
    I've got the same issue running Macos High Sierra guest on a Macos High Sierra host. Not usable. I've tride adding unlimited resources, more CPU and more memory (I have plenty) but nothing works. Any solution???
     
  7. DanP1

    DanP1 Bit poster

    Messages:
    4
    It seems to have been fixed in Parallels Desktop 13.2. But, in 13.1 there is a work-around that Parallels Support sent me:
    -----
    The reason why it was happening is due to the issue with USB 3.0 emulation when the virtual machine using more than 2 GB of memory.

    Just in case and below are the steps as a temporary workaround for this issue until the fix is released:

    1. Start Parallels Desktop and do not run the virtual machine.
    2. Press cogwheel button near the virtual machine's name to open its configuration.
    3. Go to Hardware > CPU & Memory and change memory to 2048 MB or confirm that the value is set to 2048.
    4. Switch to USB & Bluetooth and expand 'Advanced settings'.
    5. Disable USB 3.0.
     

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