4 ms·I'm guessing 2.7 but I think we'll need a few months until the preview is available to know for sure.by dudus 11y agoI'm guessing 2.7 but I think we'll need a few months until the preview is available to know for sure.jtth 11y agoFew months? I'm downloading it right now.voltagex_ 11y agoI've never used a preview build - will there be a DMG or do I need an existing Mac to upgrade?