My wife is planning to buy either a MacBook Air or MacBook Pro. She will need Parallels and Windows 10 to access a VPN where she uses Office applications. We also have a license for Office 2013, which we will install for personal use. She won't be doing any gaming or video editing. She will probably want to use apps such as Safari, Mail and iTunes at the same time as Windows 10. I'm wondering if anyone has recommendations on RAM and processors. I know that Parallels recommends 8GB of RAM, but are they recommending this just to run Windows, or does 8GB provide good performance when running Windows and Mac OS simultaneously? Also, how does Parallels run on a MacBook Air with a dual-core processor (i5 or i7)? Is it advisable to have a quad-core processor for smooth performance? Any advice would be greatly appreciated.