All currently shipping Macs, as well as models introduced within the past six years or so, can run Mojave. But sadly, Mojave does drop support for some Mac models that were able to run 10.13 High Sierra. In addition, even if your Mac can run Mojave, you may not be able to use every part of it. Certain features, such as Handoff and AirDrop between a Mac and an iOS device, require a recent version of Bluetooth—see Recent Bluetooth Hardware for an explanation.
The next several pages will help you verify that your hardware is fully compatible with Mojave. And, if you’re running 10.6 Snow Leopard or 10.7 Lion, follow the advice in OS X 10.8 Mountain Lion or Later in order to use the Mojave installer.