

10.11.6 is the most recent officially supported macOS version with a 2008 Mac Pro. Download El Capitan with a supported Mac, create a usb-key with createinstallmedia then boot your Mac Pro from it. If upgrading from macOS Sierra or later, your Mac needs 26GB of available storage to upgrade. This is a 2008 Mac Pro (MP3,1) and dont support Internet Recovery.

#Upgrading apple mac pro desktop a1186 mac os x#
To run PowerPC applications on this Mac, it will be necessary to use Mac OS X 10.6 "Snow Leopard" or earlier. MacBook introduced in 2016 or later Mac mini introduced in 2014 or later iMac introduced in late 2015 or later iMac Pro Mac Studio Mac Pro introduced in 2013 or later View the complete list of compatible computers. Please note that OS X "Lion" 10.7 and subsequent versions of OS X are not capable of running Mac OS X apps originally written for the PowerPC processor as these operating systems do not support the "Rosetta" environment. It is not capable of running macOS Sierra (10.12) or subsequent versions of the macOS at all. It also supports the last version of OS X 10.10 "Yosemite" and OS X 10.11 "El Capitan" - including Mac-to-Mac AirDrop capability - but no other advanced features are supported. *This system fully supports the last version of OS X 10.8 "Mountain Lion" and OS X 10.9 "Mavericks" except for "Power Nap" and "AirPlay Mirroring" (which also requires an Apple TV 2nd Gen or higher). Under another post it was suggested to look at everymac (dot) com, and found specs saying that the highest OS could be: X 10.11.x, and here's what it had to say: I'm running OS 10.6.8 on my 2007 MacBook Pro 17", and I was wondering what I OS I can upgrade to as Chrome and Spotify have been telling me my OS is no longer supported for months.
