The use of Rosetta ended with OS X Snow Leopard as the Rosetta application was licensed to Apple, from a software company called Transitive, which got bought out, I believe, by IBM and Appe could no longer secure their rights to continue to use Rosetta in later versions of OS X. OS X Snow Leopard had a magical and invisible PowerPC emulation application, called Rosetta, that worked seamlessly in the background that still allowed older PowerPC coded software to still operate in a Intel CPU Mac. If you run any older Mac software from the earlier PowerPC Macs, then none of this software will work with the newer OS X versions (10.7 and onward). OS X Mountain Lion, Lion, or Snow Leopard v10.6.8 already installedĢ GB or more of memory (I strongly advise, at least, 4 GBs of RAM or more)

MacBook Pro (15-inch or 17-inch, Mid/Late 2007 or later) MacBook Pro (13-inch, Mid-2009 or later), MacBook (13-inch Aluminum, Late 2008), (13-inch, Early 2009 or later) OS X 10.8 Mountain Lion purchased emailed download code here.Īpple will send you an email for the special download code for the Mac App Store, for OS X 10.8.5 Mountain Lion within three days of purchasing the download code. To download and install either the pay OS X 10.8.5 Mountain Lion or the free mac High Sierra/ macOS Sierra OR OS X 10.11.5 El Capitán you need one of these Macs: This step is really needed in case something goes wrong with the install of the new OS or you simply do not like the new OS, you have a very easy way/procedure to return your Mac to its former working state. Then, use either OS X Time Machine app to backup your entire system to the external drive OR purchase, install and use a data cloning app, like CarbonCop圜loner or SuperDuper, to make an exact and bootable copy (clone) of your entire Mac's internal hard drive.

If for some software reason, you need OS X 10.8.5 Mountain Lion, this is a paid upgrade, now.īefore embarking on a major OS upgrade, it would be wise, advisable and very prudent if you have a good, working backup of your current system to an external connected and Mac formatted Flash drive OR externally connected USB, Thunderbolt or FireWire 800, Mac formatted hard drive.

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