Seven old Apple models won't work with Mountain Lion

CUPERTINO, Calif., Feb. 17 (UPI) -- At least seven older Apple Inc. computers will likely not work with the new Mac OS X Mountain Lion operating system, a U.S. Apple-focused weblog reported.

The Mountain Lion system, introduced Thursday and to be released in late summer, has applications that mimic what's on the iPhone or iPad, including Reminders, Notes, Messages and Game Center, Apple said.

The system, whose real name is OS X 10.8, is compatible with iMac desktop computers starting in mid-2007, MacBook notebook computers as of 2008 or 2009 (depending on model), MacBook Pro from late 2007 or mid-2009 (again, depending on model), the MacBook Air thin notebook from late 2008, the Mac Mini a small form factor desktop computer from early 2009, Mac Pro workstation computer as of early 2008 and the Xserve line of rack unit computers from early 2009 on, The Unofficial Apple Weblog reported.

But earlier versions of the OS X operating systems and graphical user interfaces -- at least based on Thursday's announcement -- won't work with Mountain Lion, the blog reported.

These include:

-- Late 2006 iMacs (iMac5,1, iMac5,2, iMac6,1)

-- All plastic MacBooks that predate the aluminum unibody redesign (MacBook2,1, MacBook3,1, MacBook4,1)

-- MacBook Pros released before June 2007 (MacBookPro2,1, MacBookPro2,2)

-- The original MacBook Air (MacBookAir1,1)

-- The mid-2007 Mac Mini (Macmini2,1)

-- The original Mac Pro and its 8-core 2007 refresh (MacPro1,1, MacPro2,1)

-- Late 2006 and early 2008 Xserves (Xserve1,1, Xserve2,1)

It's possible things will change between Thursday's pre-release to developers, or programmers, and the final version, the Los Angeles Times said.

Apple had no immediate comment.

Apple said Thursday it planned to update Mac OS X once a year.