You already have Snow Leopard. Snow Leopard is OS 10.6 (most current version is OS 10.6.8). Skype for business location not working mac address changed. Lion is OS 10.7 (not available in App Store, but may be available as a Legacy product).

Mountain Lion is OS 10.8 (this is the most current OS -- will not run on Macs older than 2007-2009: exact date depends on Mac model. Mountain Lion needs specific hardware, such as a certain type of graphics card, which was not in Macs before 2007-2009). Mavericks is OS 10.9 (it is scheduled to be released by the end of 2013).

If you know the System Requirements of an OS, go to the Apple Menu and select 'About This Mac'. In that dialog box and the 'More Info' area you should find the specs you need to know. • Answered by Ewald W from Vancouve • Sep 27, 2013 •.

Most definitely with a giant caveat. OS 10.6.8 Snow Leopard is unable to function as a modern computer anymore. It was a great OS in 2009, but is so hopelessly outdated (especially the browsers) that you really can't do anything on it anymore. Mac Mac; Questions about Mac; What is the best external hard drive for my antique Mac Os X 10.6.8, that I do not wish to upgrade. My partner, having upgraded to OS 10.8.5, now wishes to revert to 10.6.8 What is the best way to achieve this, whilst still retaining some of her data.