Ok, here is a challenge for anyone. So, I am running the Mac OS X (10.7.5). I downloaded and purchased the Parallels 9. I then downloaded the Windows 8.1 and then installed the QuickBooks 2011 suite. Now, I also am running Office 2011 in Mac. So, I am trying to send my invoices to email, except the software is not recognising any email client. I went through the preferences and placed Mac as the default in email - but to no avail. So, I got a little creative and downloaded and installed Mozilla Thunderbird. And, the emailing works - but, now the QuickBooks PDF writer doesn't work. It refuses to even send a PDF version to my desktop. So, I deleted Thunderbird and now I am back to square one. I still cannot send my invoices to my email. The only thing I can do, is send a PDF copy to the desktop and then attach it to my email and send it out. Is there anyone one out there who has faced a similar situation? Is it possible that the softwares are simply not compatible...I mean, do I need to downgrade to Windows 7? Or purchase QuickBooks 2013? Any insights would be welcome! Thanks