As charted by GoSquared based on all the pageviews across all the sites they are tracking analytics for.
Here on shawnblanc.net — which has a decidedly more Mac-nerdy audience — Mavericks is already the dominant desktop OS, representing 21-percent of today’s total pageviews so far.
Here’s the breakdown for my site so far today:
| Operating System | Percent of Pageviews |
| iOS 7 (iPhone + iPad) | 33% |
| Mavericks | 21% |
| Mountain Lion | 19% |
| Windows 7 | 16% |
| The Rest | 9% |