Update: See here

I was finally able to run MAC OSX 10.5.6 on ESXi server using Xelabos 10.5.5 VMWare image which can be found in usual places, think green :). After using the Converter Standalone Client you have to delete the existing network card and add E1000 card. Everything should work. To install iPhoto 09 and Safari 4:

If you don’t have 10.5.6 and you don’t want to upgrade do this :

Go to /system/library/coreservice/SystemVersion.plist Edit this files :

ProductBuild

Version 9E17

ProductCopyright

1983-2008 Apple Inc.

ProductName

Mac OS X

ProductUserVisibleVersion

10.5.6

ProductVersion

10.5.6

after that install Security Update 2009-001
and after

Go to /system/library/coreservice/SystemVersion.plist Edit this files :

ProductBuild

Version 9E17

ProductCopyright

1983-2008 Apple Inc.

ProductName

Mac OS X

ProductUserVisibleVersion

10.5.7

ProductVersion

10.5.7

Notice the changes.

Enjoy OSX in VMWARE ESXi/ESX server.

There is a way to have OSX Server running, I was only able to install up to 10.5.4 Version, but there is an image floating around with 10.5.6 install of OSX Server.