This will take just a few seconds, the result will simply be a larger virtual disk.VBoxManage modifyhd “/path/to/your/vdi-files/.vdi” –resize Run just VBoxManage to get a list of all the options Run the command below, after adapting it to your needs.

Open a terminal window (iTerm is a great replacement for OS X’s built in Terminal app.) and cd to the directory where your.

Installing the VBox Guest Additions in the Windows 10 VM.īefore doing any of those steps, you might want to upgrade to OS X El Capitan, and to latest Virtual Box (5.x as of this writing).īefore even trying to upgrade from Windows 8.1 to 10, verify that the 8.1 VM’s disk has at least 10 GB free.

Forcing the Windows 10 installer to run, even though its hardware compatibility checker says the VBox machine is not compatible with Windows 10.

Extending the Windows 8.1 virtual disk in VBox.

Turns out this is (of course.) not as easy as one would think – but still possible. Lots of OS upgrades lately, Windows went to Windows 10 and Apple to El Capitan. I am usually pretty ok upgrading to Apple’s latest OSs a week or two after their release – they are usually of good quality.Īs VirtualBox (“VBox”) also came out with their version 5 release, it was time to upgrade the Windows 8.1 virtual machine (“VM”) running in VBox, with OS X as host.

Virtualbox guest additions windows 10