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You need to remove the Virtual PC "Guest Additions" (under Virtual PC), then install the Virtual Box "Guest Additions" after you boot the VM under VBox.


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The VBoxManage command line interface provides more control over VirtualBox than the GUI. You can add an existing VM by running this on a terminal: VBoxManage registervm /full/path/to/the/.vbox/file notice: use the full path to the .vbox file. Relative paths wont work (Im on version 4.3.20r96996) This command will only register the vm and wont copy/move ...


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I ran into crippling slowness on a Mid-2011 iMac in Fusion 7 after upgrading to Yosemite. It wasn't Fusion, but all hypervisors were hit by a bug found across the Mid-2011 lineup. If that sounds like your Mac, you can fix it by restarting after running: sudo nvram boot-args=debug=0x10 I'm not sure why it works, but it does. Here's a Parallels KB on it. ...


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The desktop virtualization technology VirtualBox does indeed provide live migration. It is called teleportation though. An example can be seen here. XEN does provide this functionality. And KVM provides this functionality as well. And VMWare provides this functionality as well through vSphere. Edit: Microsoft Hyper-V provides this functionality as well.


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You can not use the same virtual file to boot in both Exsi server and virtual box since this might corrupt the files and wont work as you expected.But you can create virtual machines using ovf and ova formats and both will react as different instance where the changes won't be committed/synced in between the virtual machines.



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