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Important when migrating to ESXi 5.5: “Do not upgrade the virtual hardware of your VMs!” (via:

Posted by jpluimers on 2014/03/14

Thanks to the guys at

Do not upgrade the virtual hardware of your VMs!

If you try to upgrade the virtual hardware of your VMs to the new revision 10 after you have updated the host to ESXi 5.5 then the following warning will be displayed by the vSphere Client:

“If you upgrade the virtual hardware to this level, use the vSphere Web Client for managing these VMs.”

– Think twice here!

Do not do this if you are using the free license with this host or cannot manage it through vCenter for some other reason! If you do this you will no longer be able to edit the VM’s properties with the (legacy) vSphere Client. Whenever you try this the following message will be displayed:

“Use the vSphere Web Client to edit the settings of this virtual machine”

– Too bad if you do not have vCenter and the Web Client available …

It might be possible to do part of the management from VMware Workstation 10, I need to read the whole ESXi 5.5 Free Hypervisor Web Console | VMware Communities for that. If that works, hopefully they have thought of VMware Fusion 6 as well.


via: VMware Front Experience: How to update your standalone host to ESXi 5.5 – beware of missing drivers and do NOT upgrade virtual hardware!.

(thanks to Matthijs ter Woord for pointing me at this)

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