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mrplow

 
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Member Since: Oct 01, 2007
Location: UK
Posts: 6,748
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Mac Specs: 27" iMac i7 (2011) 10.10, iPhone6, iPad Air, AppleTV2

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Click the Apple symbol on (top left of the screen) - select About this Mac.
The box that pops up will tell you the version of OSX you have.
10.6.n is Snow Leopard - the pre-requisite to install Lion.

So long as you're running Snow Leopard and have all the latest updates you should have the Mac App Store Icon on the dock.

Start this up and search for Lion. It downloads and installs straight from the Mac app store.

As with any OS update I'd suggest a full back up etc prior to updating.

External hard disk acquisition addict - but admitting the problem is the first step to a robust backup

Please use the reputation system if you think you've been helped - top right of this post
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