Here’s some of the info you can find in iCreate issue 123, along with some reference tables with what you can expect:
Providing your iMac is a mid-2007 model or later (all the way up to the present day, super-slim models) you should be fine to install and use Mavericks on your desktop machine.
13-inch MacBook Pros from mid-2009 or later are currently supported by Mavericks, as are 15-inch models from mid/late-2007 or later and the 17-inch model from late-2007 or later.
The late-2008 model MacBook Air, and anything more recent than that will happily run OS X Mavericks, according to the developer preview so far, so long as there’s enough disk space for the install.
Mac mini models launched in early-2009 or later will run OS X Mavericks once the upgrade hits the Mac App Store later in the autumn.
If you’re lucky enough to own an original MacBook, you’ll be pleased to know that the late-2008 aluminium model, as well as those from early-2009 or later, will run Mavericks. Similarly, Xserves from early-2009 or later will also run OS X 10.9.
The minimum requirements for Mavericks at present are 2GB memory, 8GB of available hard drive space and at least OS X Snow Leopard running to install Mavericks.