Apple has updated its desktop operating system Mac OS X on Wednesday night, alongside the roll-out of iOS 6, bringing a number of fixes and Facebook to the company's line of Mac computers.

The new update, which is available now, weighs in at over 350MB and means users will be able to post status updates and share photos and websites quickly via the new share buttons dotted around the OS. We tested the Facebook integration in July. See how we got on

Apple OS X Mountain Lion review

But it's not just Facebook that is being added. MacBook Air (Late 2010) owners will get Power Nap support, You can now add passes to Passbook from Safari, and iMessages sent to your phone number now appear on Messages on your Mac too.

Mountain Lion tips and tricks

Apple also says the new The OS X Mountain Lion v10.8.2 update includes general operating system fixes that improve the stability, compatibility and security of your Mac. 

Some of the more interesting ones include being able to receive notifications when anyone sends you a Twitter mention, and disabling notifications when you are AirPlay Mirroring.