Thanks for answer.
Let me try to explain you what happened:
I installed in my forum this tool:
http://translate.google.com/translate_tools?hl=en&layout=1&eotf=1&sl=en&tl=es
I copied and pasted the code in my forum and it works good if my users
are using a pc. This is the code that I am using:
<div id="google_translate_element"></div><script>
function googleTranslateElementInit() {
new google.translate.TranslateElement({
pageLanguage: 'en'
}, 'google_translate_element');
}
</script><script src="http://translate.google.com/translate_a/
element.js?cb=googleTranslateElementInit"></script>
I have some Mac users and they can not view the translate tool in my
web, and I don't have any idea why this happens just with Mac users.