I have a 2009 Mac Pro 4,1 Quad Core. What is the latest version of Mac OS that support that platform? And how do I get to it? Do I need to purchase Mac OS El Capitan? Thanks
MacBook Air, Mac OS X (10.6.8), Total Capacity : 121.33 GB (121,332
An unmodified Mac Pro silver tower 4,1 can run at the latest 10.11 ElCapitan. You launch the Mac App store (provided you are running 10.6.8 fully updated with ALL software updates available) and buy it. It is on sale for $0.
Any software you "Purchase" from the Mac App store is tagged with your Apple-ID before it is sent to you via download. So you should try to use the same Apple-ID in all cases to avoid future confusion and facilitate updates.
Mac Pro 4,1 modified with 5,1 firmware (which Apple does not support or encourage) can run 10.12 Sierra.
Latest supported Mac OS for Mac Pro 4,1
