Apple unveiled OS X 10.11 El Capitan, the new version of its Mac operating system, during its WWDC 2015 keynote at the beginning of June. The update to the operating system finally arrived on Wednesday 30 September.

The big question is, will OS X 10.11 work on your Mac? We investigate below.

Find out what new features arrived with Mac OS X 10.11 El Capitan, and if there are any issues with El Capitan here and here are our top tips for OS X El Capitan.  PLUS:  Features in OS X 10.12, successor to El Capitan: Wishlist

OS X 10.11 El Capitan system requirements: Will 10.11 work on my Mac?

Yosemite required 2GB RAM to run and same will apply for its successor - this is unlikely to be an issue as Macs have shipped with more than 4GB RAM for many years now.

You will also need 8GB of available storage as the installer weighs in at about 6GB (last year Yosemite was about 5.6GB). This doesn't mean that the installation will eventually take up that much space, just that the files required for the install will.

You will also need to be running at least OS X 10.6.8 Snow Leopard, as you will need access to the Mac App Store in order to download the update before installing (if you are running a version of OS X that predates Snow Leopard find out how to buy a copy of the Snow Leopard software here.

Which Macs will be compatible with El Capitan?

Like Yosemite and Mavericks before it, El Capitan can run on the following Macs:

iMac (Mid-2007 or later)

MacBook (13-inch Aluminum, Late 2008), (13-inch, Early 2009 or later)

MacBook Pro (13-inch, Mid-2009 or later), (15-inch, Mid/Late 2007 or later), (17-inch, Late 2007 or later)

MacBook Air (Late 2008 or later)

Mac Mini (Early 2009 or later)

Mac Pro (Early 2008 or later)

Xserve (Early 2009)

All of these Macs feature a 64-bit CPU.

Apple hasn't changed the requirements for OS X in a number of years, many of these Macs are now seven to eight years old.

How do I know if my Mac will run El Capitan?

Find out if your Mac is supported by clicking on the Apple logo in the top left of your screen, and selecting About This Mac > Overview. There you will see details of which Mac you have, and the year that model first appeared.

Will El Capitan make my Mac run faster or slower?

When Apple announced that El Capitan would have the same system requirements as Yosemite and Mavericks it also confirmed that the next version of OS X would also offer improved performance on the older hardware.

Read: Here are our top ten features coming in OS X El Capitan and How El Capitan compares to Yosemite

If you install El Capitan and then think you made a mistake, here's How to remove El Capitan and revert to Yosemite