The biggest gripe last time around was about the Late 2006 Mac mini, which was under five years old when Lion was released and not replaced with a Lion-compatible model until Mid 2007. We expect that, but we also expect that Apple will support almost all Macs introduced within five years of the new operating system.
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With each new version of Mac OS X since 10.2, some additional Macs have been left behind. OS X 10.6 Snow Leopard dropped all support for PowerPC Macs, and OS X 10.7 Lion eliminated support for Core Solo and Core Duo Macs, all of which were introduced in 2006.
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With OS X 10.5 Leopard, Apple left behind all the G3 Macs that had been supported by OS X 10.4 Tiger, as well as refusing to install on G4 Macs clocked below 867 MHz. A third option allows you to use all the old Mac software you were able to use with Lion.
Apple’s “more secure” option restricts that to just software from the Mac App Store. It’s billed as a security feature, and in its default configuration it will only allow you to use apps purchased from the Mac App Store and third party apps marked with an approved Apple Developer ID. Gatekeeper is bound to be the most controversial feature of OS X 10.8. I’m sure Apple will get a better handle on that long before Mountain Lion ships. Messages is available in beta to current OS X 10.7 Lion users, although early users are reporting problems where messages may reach your iPhone or iPad or Mac, but not all of them. Share Sheets will make it easy to share links on the Web, post photos and videos, email or message notes, and tweet. Other features coming to the Mac include AirPlay Mirroring, Game Center, Notes, and Twitter integration. After all, there are iOS features that Macs should have had all along, such as Notification Center (far superior to Growl) and Reminders (better than iCal for reminders), that we’ll have on Mountain Lion Macs. As expected, it’s going to make Macs a lot more like iOS devices, which is a good thing in some ways. This week’s announcement of the Mac OS X 10.8 Mountain Lion developer preview is one of those times. Sometimes you just have to scratch your head and ask yourself, “What the hell is Apple thinking?” Mountain Lion This list is not definitive, but it’s the best we have at present. It looks like all Late 2006 iMacs, all MacBooks without Nvidia graphics, all Mac Pros released before June 2007 (20 Mac Pros), and 20 Xserves will not be able to run OS X 10.8. Since first posting this article, we’ve heard from several readers and learned from other websites that our list of the oldest Macs that should work with Mountain Lion is on the optimistic side.
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