This is new with OS X 10.7 (Lion). 

There are also certain conditions on this. First of all, you need to be running 
OS X VMs on Apple hardware, and there is a hard limit on the number of 
virtualized instances that you can run on any machine. Second, the VMs need to 
be run on a system that is already running Lion.

The documents listed in this JIRA issue describe installing VMware ESX as a 
hypervisor (on Mac Pro hardware) and then running three instances of Lion 
inside that. I am not sure that entirely conforms to the EULA. My reading of 
it, at least, is that you need to have an instance of OS X running directly on 
the hardware.

The EULA for Lion states (in section B):
B. License from Mac App Store. If you obtained a license for the Apple Software 
from the Mac App Store, then subject to the terms and conditions of this 
License and as permitted by the Mac App Store Usage Rules set forth in the App 
Store Terms and Conditions ( (“Usage 
Rules”), you are granted a limited, non-transferable, non-exclusive license: 


(iii) to install, use and run up to two (2) additional copies or instances of 
the Apple Software within virtual operating system environments on each Mac 
Computer you own or control that is already running the Apple Software.
This is further qualified with the following:

The grant set forth in Section 2B(iii) above does not permit you to use the 
virtualized copies or instances of the Apple Software in connection with 
service bureau, time-sharing, terminal sharing or other similar types of 

This last clause also potentially conflicts with what the VCL is doing, namely 
"terminal sharing or other similar types of services".

Or is there another way to read this?


Aaron Coburn
Systems Administrator and Programmer
Academic Technology Services, Amherst College
(413) 542-5451

On Feb 24, 2012, at 8:29 AM, Mark Gardner wrote:

> While I am glad to see OSX supported, I was under the impression that
> it was against Apple's license. Am I out of touch?
> Mark
> On Tue, Dec 6, 2011 at 7:44 PM, James O'Dell (Created) (JIRA)
> <> wrote:
>> OSX under ESXi 4.1
>> ------------------
>>                 Key: VCL-543
>>                 URL:
>>             Project: VCL
>>          Issue Type: Improvement
>>          Components: database, vcld (backend), web gui (frontend)
>>    Affects Versions: 2.2.1
>>            Reporter: James O'Dell
>>             Fix For: 2.2.1
>> VCL needs OSX support. These files are my first attempt at doing so.
>> --
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> -- 
> Mark Gardner
> --

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