On the 3rd June 2019 Apple announced the next version of macOS 10.15 Catalina, it will be the sixteenth release of macOS and is expected to be released to the public this autumn. As with previous versions macOS Catalina is named after a location in California, in this case Santa Catalina Island.
macOS 10.15 Catalina brings multiple improvements over macOS 10.14 Mojave. Most notably iTunes will be replaced by four separate Apps; Apple Music, Apple TV, Apple Books and Apple Podcasts. This aligns macOS more closely to iOS and should make the user experience much more streamlined between devices.
Another interesting feature is Sidecar, this will allow an iPad to be used as a second display and input device much like a graphics tablet, so documents on a Mac can be annotated on the fly from an iPad.
Macs support by macOS Catalina
macOS 10.15 Catalina will run on all Macs that were supported by the the previous version of macOS, macOS 10.14 Mojave. The only exception are some of the older Mid 2010 and Mid 2012 Mac Pro models. The following models will support macOS 10.15 Catalina,
MacBook: Early 2015 or newer
MacBook Air: Mid 2012 or newer
MacBook Pro: Mid 2012 or newer
iMac: Late 2012 or newer
Mac Pro: Late 2013 or newer
Mac Mini: Late 2012 or newer
If you are unsure which model Mac you have then you can identify it by going to the Apple () menu and clicking About This Mac, here the model and model year will be displayed.