Poor performance with Virtual Box on MacBook Pro 2017 I am running Ubuntu 16.04 via Virtual Box on my MacBook Pro 2017 w/ TouchBar (3.3Ghz i7, 16 GB 2133 MHZ) and I am getting a very laggy and unpleasant experience on the machine. I have gone through the suggested changes from 7 years ago here:  https://superuser.com/questions/172989/virtualbox-running-ubuntu-is-slow-mac-os-x-host

But it does not seem to make a difference. Even when I change the resolution to 720p the performance is still quite poor. Here are the settings for the vm: 

 &lt;Hardware&gt;
  &lt;CPU&gt;
    &lt;PAE enabled="true"/&gt;
    &lt;LongMode enabled="true"/&gt;
    &lt;X2APIC enabled="true"/&gt;
    &lt;HardwareVirtExLargePages enabled="true"/&gt;
  &lt;/CPU&gt;
  &lt;Memory RAMSize="8192"/&gt;
  &lt;HID Pointing="USBTablet"/&gt;
  &lt;Chipset type="ICH9"/&gt;
  &lt;Display VRAMSize="128"/&gt;
  &lt;VideoCapture fps="25" options="ac_enabled=false"/&gt;
  &lt;RemoteDisplay&gt;
    &lt;VRDEProperties&gt;
      &lt;Property name="TCP/Ports" value="3389"/&gt;
    &lt;/VRDEProperties&gt;
  &lt;/RemoteDisplay&gt;
  &lt;BIOS&gt;
    &lt;IOAPIC enabled="true"/&gt;
  &lt;/BIOS&gt;
  &lt;USB&gt;
    &lt;Controllers&gt;
      &lt;Controller name="OHCI" type="OHCI"/&gt;
    &lt;/Controllers&gt;
  &lt;/USB&gt;
  &lt;StorageController name="IDE" type="PIIX4" PortCount="2" useHostIOCache="true" Bootable="true"&gt;


Any thoughts on the settings? I feel like I should be able to get some decent performance out of this machine. (I have tried smaller RAMsizes with no success either). Alternative solutions if this a common Virtual Box issue?
The problem is Retina itself. If you use other monitor with other resolution (no retina) you'll see much better performance.
I think it's an issue with OSX and Retina/HiDPI Resolutions.