I upgraded VirtualBox and am now unable to run a saved machine because of USB 2.0.

When I tried to resolve the problem by installing the VirtualBox extension pack I get the error Incompatible library version: VBoxPuelMain.dylib requires version 4.1.0 or later, but VBoxVMM.dylbin provides version 4.0.12.

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migrated from serverfault.com Aug 6 '11 at 22:52

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2 Answers

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Make sure that you have the correct extensions installed, since they're not automatically upgraded with VirtualBox. You can check in VBox from the menu... File > Preferences > Extensions.

Here are the latest downloads... http://www.virtualbox.org/wiki/Downloads

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You are probably trying to install the extension of a newer VBox (I did the same :P). You have 2 options:

1 - download the right version in this link http://download.virtualbox.org/virtualbox/4.0.12/Oracle_VM_VirtualBox_Extension_Pack-4.0.12-72916.vbox-extpack;

2 - download a newer version of VirtualBox (v4.1.2 at the moment - http://www.virtualbox.org/wiki/Downloads) and try to install the same extension you are getting this error.

I did the second option and it's working fine now ;-)

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