Another Take on Jaguar Upgrade Percentages -- Last week, I commented that I'd heard from a developer at MacHack that a non-trivial percentage of Mac OS X users had not upgraded from Mac OS X 10.1 to Jaguar, a fact I found surprising. It turns out I had reason to be surprised - it had simply been reported to me incorrectly (as the developer said, it's never safe to believe anything that's said after 48 hours of sleeplessness at MacHack). Here's the real deal. About 75 percent of this developer's users are running Mac OS X, and only about 1 percent are still using Mac OS X 10.1. A second developer whose software also reports operating system version also shared his numbers, which were almost identical, so I think it's safe to say that the number of users running Mac OS X 10.1 is vanishingly small.

Now, these numbers come with several caveats. First, although they're automatically collected, sending the information is optional, so it's conceivable that people running earlier versions of Mac OS X may not be volunteering the information as readily. Second and more likely to skew the results, these numbers come from people registering current software products, and that is a behavior that likely trends with continually upgrading the operating system. To put it another way, those who didn't pay for the upgrade to Jaguar may also be less likely to register shareware. [ACE]