Justin is thinking of switching from Mac to Windows. Leo says that there's nothing he can't do on Windows that he can do on the Mac, but he thinks that developers prefer to use Mac because it's basically a Unix foundation. Leo also says that they may not be fans of Apple's new touch bar interface because the escape key has disappeared unless you customize it.
Justin is concerned, though, about how he can read his Mac formatted drives with a PC. Windows can't read HFS+ without special software. He could format the hard drive with a format that both Mac and Windows can read, such as ExFAT. He should check out this article on makeuseof.com: "Four Ways to Read a Mac Formatted Drive in Windows."