Apple has not published an actual list of Mojave-works Macs, but when it rolled out the developer beta two weeks ago, the company said macOS 10.14 is "for Macs introduced in mid-2012 or later, plus 2010 and 2012 Mac Pro models with recommended Metal-capable graphics cards."
That short sentence rubbed out all Macs introduced in 2009, 2010 and 2011, leaving these on the Mojave approved list:
- MacBook Air; mid-2012 (6/2012) and later MacBook;
- early-2015 (4/2015) and later MacBook Pro;
- mid-2012 (6/2012) and later MacBook Pro with Retina, 15-in. model;
- mid-2012 (6/2012) and later MacBook Pro with Retina, 13-in. model;
- late-2012 (10/2012) and later iMac;
- late 2012 (10/2012) and later iMac Pro;
- 2017 (12/2017) and later Mac Mini;
- late-2012 (10/2012) and later Mac Pro;
- late 2013 (12/2013) and later, mid-2010 (8/2010) with Metal-capable GPU, mid-2012 (6/2012) with Metal-capable GPU.
macOS Mojave will be offered as a free download from the Mac App Store when it launches this fall, most likely in September.