Apple Inc. has equipped its newly released OS X Mountain Lion operating system with features from the company's mobile platform, including some that are popular with real estate agents. But before rushing to the App Store to upgrade your Mac, it's important to make sure the critical software you're using today is compatible. For those keeping score at home, Mountain Lion is version 10.8 of Apple's operating system for laptops and desktops. The system is available via the App Store as an upgrade for $19.99. Most Macs made since 2008 and 2009 can be upgraded, and iMacs and MacBook Pros made as long ago as mid-2007 will also run Mountain Lion.Unlike Microsoft's responsive approach to Windows 8, which is scheduled to be released at the end of October, Apple's strategy has been to differentiate...