Apple's new operating system, Mac OS X Leopard (10.5), sold 2 million copies since the product was released on Friday, Oct. 26. Even if a significant number of customers reported Windows-like blue screens of death upon install, sales still ran strong. This rate of sales outpaces the first-weekend sales of the previous version, Mac OS X v10.4 "Tiger," which up until now has held the record for being the most successful OS release in Apple's history.

"Early indications are that Leopard will be a huge hit with customers. Leopard's innovative features are getting great reviews and making more people than ever think about switching to the Mac," said Apple CEO Steve Jobs in a statement.

Meanwhile, the OSx86 Scene forum posted instructions to install Apple's Leopard, on a PC. The special install process unfortunately has some consequences, as features such as Wi-Fi support are disabled.

Some have blasted Apple for asking for quite a lot of personal information in the registration screen, and argued that probably Microsoft couldn’t have gotten away with it. Surprisingly, Apple did, so far. In addition to the $129 single license, Apple offers a very affordable Mac OS X Leopard Family Pack, which is a license for five users from a single household, which will retail at $199. The Mac OS X Server Leopard sells for $499 for a 10-client edition and $999 for an unlimited client edition.

Mac OS X 10.5 Leopard requires a minimum of 512MB of RAM and is designed to run on any Macintosh computer with an Intel, PowerPC G5 or G4 (867 MHz or faster) processor.

Apple claims its Leopard features more than 300 new features, such as a new desktop which includes the redesigned 3D Dock with Stacks; a backup feature called Time Machine which lets users easily back up all of the data on their Mac, find lost files and even restore all of the software on their Mac; the complete Boot Camp release, which makes it possible to run Windows natively on Intel-based Macs (you need a separate Windows install kit and license, of course); improved Parental Controls, providing automatic identification of unsuitable content before allowing website access, time limits and activity logs that can be accessed from any Mac on a home network, and other parental control features, etc.

Security was also beefed: Leopard records information about any program you download over the Internet and shows that info to you the first time you run it; and Apple added optional authenticity verification which verifies whether a program is unchanged since it was produced by its developer, among other less obvious improvements.