Get-VMMacAddress

function Get-VMMacAddress {
param ($mac)
if ($mac -match "([0-9A-Fa-f]{4}[-.:]){2}([0-9A-Fa-f]{4})") {
    #change 4.4.4 format to 2:2:2:2:2:2
    $mactemp = $mac.Replace("-","").Replace(".","").Replace(":","")
    for ($i=$mactemp.Length -2 ; $i -gt 0 ;$i=$i-2){$mactemp=$mactemp.insert($i,":")}
    $mac = $mactemp
    }
if ($mac -match "([0-9A-Fa-f]{2}[-.]){5}([0-9A-Fa-f]{2})") {
    #replace 2-2-2-2-2-2 format to 2:2:2:2:2:2
    $mac = $mac.Replace("-",":")    }
$vm=Get-VM | Get-NetworkAdapter | Where {$_.MacAddress -eq $mac}
$vm | Select-Object Parent,Name,MacAddress
}