Danbertrand
this is short procedure
You need to SSH the ESXi host from MAC terminal
You can create a VM using VM CLI commands
http://blogs.balius.com/2010/12/24/esxi-creating-new-virtual-machines-servers-from-the-command-line/
Addition Resource
vSphere Command-Line Interface Documentation
Once you have done with installation,SSH the VM and do yum update.