"The OS X Mountain Lion Up-to-Date upgrade will be available at no additional charge from the Mac App Store to all customers who purchase a qualifying new Mac system from Apple or an Apple Authorized Reseller on or after June 11, 2012." - <a href="http://www.apple.com/osx/uptodate/" rel="nofollow">http://www.apple.com/osx/uptodate/</a><p>(I'm sure the site will be live tomorrow to get the free update.)
Shame about the lack of support for older macs. I've upgraded my late 2006 MacBook with a new SSD and the thing runs great. Best upgrade I've ever done. Now mountain lion isn't supported. Looks like apple trying to increase those profits even further.<p>Your Mac must be one of the following models:<p>iMac (Mid 2007 or newer)
MacBook (Late 2008 Aluminum, or Early 2009 or newer)
MacBook Pro (Mid/Late 2007 or newer)
MacBook Air (Late 2008 or newer)
Mac mini (Early 2009 or newer)
Mac Pro (Early 2008 or newer)
Xserve (Early 2009)<p><a href="http://www.apple.com/osx/how-to-upgrade/" rel="nofollow">http://www.apple.com/osx/how-to-upgrade/</a>
The Messages app still isn't something I'd consider beta quality.<p>Messages show up and seemingly random times on all devices. Sometimes, they don't both to show up on a device (typically the Mac). Sending still works fine, until over the weekend, when I became unable to initiate iMessage conversations on my Mac. I'm told that the other person is "offline", while I'm having a conversation with them on my iPhone.<p>It's really bad. I hope there have been some fixes, but since I'm running "Gold Master", maybe not.